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142047427 = 178355731
BaseRepresentation
bin10000111011101…
…11100011000011
3100220021202102211
420131313203003
5242331004202
622032322551
73343245304
oct1035674303
9326252384
10142047427
1173200375
123b6a3457
1323576242
1414c187ab
15c70d1d7
hex87778c3

142047427 has 4 divisors (see below), whose sum is σ = 150403176. Its totient is φ = 133691680.

The previous prime is 142047377. The next prime is 142047431. The reversal of 142047427 is 724740241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 724740241 = 269212.

It is a cyclic number.

It is not a de Polignac number, because 142047427 - 27 = 142047299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142047457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4177849 + ... + 4177882.

It is an arithmetic number, because the mean of its divisors is an integer number (37600794).

Almost surely, 2142047427 is an apocalyptic number.

142047427 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

142047427 is a deficient number, since it is larger than the sum of its proper divisors (8355749).

142047427 is an equidigital number, since it uses as much as digits as its factorization.

142047427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8355748.

The product of its (nonzero) digits is 12544, while the sum is 31.

The square root of 142047427 is about 11918.3651143938. The cubic root of 142047427 is about 521.7684206895.

Adding to 142047427 its reverse (724740241), we get a palindrome (866787668).

The spelling of 142047427 in words is "one hundred forty-two million, forty-seven thousand, four hundred twenty-seven".

Divisors: 1 17 8355731 142047427