15001972 has 6 divisors (see below), whose sum is σ = 26253458. Its totient is φ = 7500984.

The previous prime is 15001967. The next prime is 15001979. The reversal of 15001972 is 27910051.

It can be written as a sum of positive squares in only one way, i.e., 12916836 + 2085136 = 3594^2 + 1444^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15001979) 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 as a sum of consecutive naturals, namely, 1875243 + ... + 1875250.

Almost surely, 2^15001972 is an apocalyptic number.

It is an amenable number.

15001972 is a deficient number, since it is larger than the sum of its proper divisors (11251486).

15001972 is a wasteful number, since it uses less digits than its factorization.

15001972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3750497 (or 3750495 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 15001972 is about 3873.2379219459. The cubic root of 15001972 is about 246.6320144488.

The spelling of 15001972 in words is "fifteen million, one thousand, nine hundred seventy-two".