15172442 has 8 divisors (see below), whose sum is σ = 23373876. Its totient is φ = 7381152.

The previous prime is 15172441. The next prime is 15172447. The reversal of 15172442 is 24427151.

It can be written as a sum of positive squares in 2 ways, for example, as 10883401 + 4289041 = 3299^2 + 2071^2 .

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

It is not an unprimeable number, because it can be changed into a prime (15172441) 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, 102443 + ... + 102590.

Almost surely, 2^15172442 is an apocalyptic number.

15172442 is a deficient number, since it is larger than the sum of its proper divisors (8201434).

15172442 is a wasteful number, since it uses less digits than its factorization.

15172442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205072.

The product of its digits is 2240, while the sum is 26.

The square root of 15172442 is about 3895.1818956244. The cubic root of 15172442 is about 247.5626722898.

Adding to 15172442 its reverse (24427151), we get a palindrome (39599593).

The spelling of 15172442 in words is "fifteen million, one hundred seventy-two thousand, four hundred forty-two".