71564725 has 6 divisors (see below), whose sum is σ = 88740290. Its totient is φ = 57251760.

The previous prime is 71564687. The next prime is 71564741. The reversal of 71564725 is 52746517.

It can be written as a sum of positive squares in 3 ways, for example, as 617796 + 70946929 = 786^2 + 8423^2 .

It is not a de Polignac number, because 71564725 - 2¹¹ = 71562677 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1431270 + ... + 1431319.

Almost surely, 2^71564725 is an apocalyptic number.

It is an amenable number.

71564725 is a deficient number, since it is larger than the sum of its proper divisors (17175565).

71564725 is a wasteful number, since it uses less digits than its factorization.

71564725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2862599 (or 2862594 counting only the distinct ones).

The product of its digits is 58800, while the sum is 37.

The square root of 71564725 is about 8459.5936663648. The cubic root of 71564725 is about 415.1767283293.

It can be divided in two parts, 7156 and 4725, that added together give a square (11881 = 109²).

The spelling of 71564725 in words is "seventy-one million, five hundred sixty-four thousand, seven hundred twenty-five".