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1420304131 = 1987785237
BaseRepresentation
bin101010010101000…
…0001111100000011
310122222112220222201
41110222001330003
510402044213011
6352534014031
750124246241
oct12452017403
93588486881
101420304131
116697a7574
123377a7317
1319833a45c
14d68b9791
1584a55cc1
hex54a81f03

1420304131 has 8 divisors (see below), whose sum is σ = 1496779280. Its totient is φ = 1344001248.

The previous prime is 1420304113. The next prime is 1420304141. The reversal of 1420304131 is 1314030241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1420304131 - 213 = 1420295939 is a prime.

It is a super-2 number, since 2×14203041312 = 4034527649071330322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1420304099 and 1420304108.

It is not an unprimeable number, because it can be changed into a prime (1420304141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25956 + ... + 59281.

It is an arithmetic number, because the mean of its divisors is an integer number (187097410).

Almost surely, 21420304131 is an apocalyptic number.

1420304131 is a deficient number, since it is larger than the sum of its proper divisors (76475149).

1420304131 is an equidigital number, since it uses as much as digits as its factorization.

1420304131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86133.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1420304131 is about 37686.9225461565. The cubic root of 1420304131 is about 1124.0711031269.

Adding to 1420304131 its reverse (1314030241), we get a palindrome (2734334372).

The spelling of 1420304131 in words is "one billion, four hundred twenty million, three hundred four thousand, one hundred thirty-one".

Divisors: 1 19 877 16663 85237 1619503 74752849 1420304131