15972565 has 16 divisors (see below), whose sum is σ = 22416768. Its totient is φ = 10696896.

The previous prime is 15972553. The next prime is 15972569. The reversal of 15972565 is 56527951.

It is not a de Polignac number, because 15972565 - 2⁹ = 15972053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15972569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3802 + ... + 6811.

It is an arithmetic number, because the mean of its divisors is an integer number (1401048).

Almost surely, 2^15972565 is an apocalyptic number.

It is an amenable number.

15972565 is a deficient number, since it is larger than the sum of its proper divisors (6444203).

15972565 is a wasteful number, since it uses less digits than its factorization.

15972565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10668.

The product of its digits is 94500, while the sum is 40.

The square root of 15972565 is about 3996.5691536617. The cubic root of 15972565 is about 251.8401028563.

The spelling of 15972565 in words is "fifteen million, nine hundred seventy-two thousand, five hundred sixty-five".