15372442 has 4 divisors (see below), whose sum is σ = 23058666. Its totient is φ = 7686220.

The previous prime is 15372439. The next prime is 15372443. The reversal of 15372442 is 24427351.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12809241 + 2563201 = 3579^2 + 1601^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 15372442.

It is not an unprimeable number, because it can be changed into a prime (15372443) 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 as a sum of consecutive naturals, namely, 3843109 + ... + 3843112.

Almost surely, 2^15372442 is an apocalyptic number.

15372442 is a deficient number, since it is larger than the sum of its proper divisors (7686224).

15372442 is an equidigital number, since it uses as much as digits as its factorization.

15372442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7686223.

The product of its digits is 6720, while the sum is 28.

The square root of 15372442 is about 3920.7705875249. The cubic root of 15372442 is about 248.6457007418.

Adding to 15372442 its reverse (24427351), we get a palindrome (39799793).

The spelling of 15372442 in words is "fifteen million, three hundred seventy-two thousand, four hundred forty-two".