15021972 has 36 divisors (see below), whose sum is σ = 43397536. Its totient is φ = 4291920.

The previous prime is 15021961. The next prime is 15021997. The reversal of 15021972 is 27912051.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 29554 + ... + 30057.

Almost surely, 2^15021972 is an apocalyptic number.

15021972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15021972 is an abundant number, since it is smaller than the sum of its proper divisors (28375564).

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

15021972 is a wasteful number, since it uses less digits than its factorization.

15021972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59628 (or 59623 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 15021972 is about 3875.8188812172. The cubic root of 15021972 is about 246.7415656002.

It can be divided in two parts, 150 and 21972, that added together give a palindrome (22122).

The spelling of 15021972 in words is "fifteen million, twenty-one thousand, nine hundred seventy-two".