15312642 has 8 divisors (see below), whose sum is σ = 30625296. Its totient is φ = 5104212.

The previous prime is 15312637. The next prime is 15312643. The reversal of 15312642 is 24621351.

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

15312642 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (15312643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1276048 + ... + 1276059.

It is an arithmetic number, because the mean of its divisors is an integer number (3828162).

Almost surely, 2^15312642 is an apocalyptic number.

15312642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15312642 is a wasteful number, since it uses less digits than its factorization.

15312642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2552112.

The product of its digits is 1440, while the sum is 24.

The square root of 15312642 is about 3913.1371046770. The cubic root of 15312642 is about 248.3228646949.

Adding to 15312642 its reverse (24621351), we get a palindrome (39933993).

The spelling of 15312642 in words is "fifteen million, three hundred twelve thousand, six hundred forty-two".