315121042 has 8 divisors (see below), whose sum is σ = 497559600. Its totient is φ = 149267844.

The previous prime is 315121031. The next prime is 315121043. The reversal of 315121042 is 240121513.

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

It is a super-2 number, since 2×315121042² = 198602542222331528, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (315121043) 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 3 ways as a sum of consecutive naturals, for example, 4146292 + ... + 4146367.

It is an arithmetic number, because the mean of its divisors is an integer number (62194950).

Almost surely, 2^315121042 is an apocalyptic number.

315121042 is a deficient number, since it is larger than the sum of its proper divisors (182438558).

315121042 is a wasteful number, since it uses less digits than its factorization.

315121042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8292680.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 315121042 is about 17751.6489938259. The cubic root of 315121042 is about 680.4963518547.

Adding to 315121042 its reverse (240121513), we get a palindrome (555242555).

The spelling of 315121042 in words is "three hundred fifteen million, one hundred twenty-one thousand, forty-two".