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1242105321 = 31065738851
BaseRepresentation
bin100101000001001…
…0000010111101001
310012120020111011210
41022002100113221
510020434332241
6323130343333
742531502212
oct11202202751
93176214153
101242105321
11588155126
122a7b8ab49
1316a447382
14bad70409
15740a6316
hex4a0905e9

1242105321 has 8 divisors (see below), whose sum is σ = 1656338464. Its totient is φ = 827971200.

The previous prime is 1242105301. The next prime is 1242105407. The reversal of 1242105321 is 1235012421.

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

It is not a de Polignac number, because 1242105321 - 26 = 1242105257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242105301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12546 + ... + 51396.

It is an arithmetic number, because the mean of its divisors is an integer number (207042308).

Almost surely, 21242105321 is an apocalyptic number.

It is an amenable number.

1242105321 is a deficient number, since it is larger than the sum of its proper divisors (414233143).

1242105321 is a wasteful number, since it uses less digits than its factorization.

1242105321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49511.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1242105321 is about 35243.5145948868. The cubic root of 1242105321 is about 1074.9447445188.

Adding to 1242105321 its reverse (1235012421), we get a palindrome (2477117742).

The spelling of 1242105321 in words is "one billion, two hundred forty-two million, one hundred five thousand, three hundred twenty-one".

Divisors: 1 3 10657 31971 38851 116553 414035107 1242105321