15790042 has 8 divisors (see below), whose sum is σ = 25078356. Its totient is φ = 7430592.

The previous prime is 15790039. The next prime is 15790057. The reversal of 15790042 is 24009751.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13097161 + 2692881 = 3619^2 + 1641^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232173 + ... + 232240.

Almost surely, 2^15790042 is an apocalyptic number.

15790042 is a deficient number, since it is larger than the sum of its proper divisors (9288314).

15790042 is a wasteful number, since it uses less digits than its factorization.

15790042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464432.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 15790042 is about 3973.6685820536. The cubic root of 15790042 is about 250.8771428822.

Adding to 15790042 its reverse (24009751), we get a palindrome (39799793).

The spelling of 15790042 in words is "fifteen million, seven hundred ninety thousand, forty-two".