71508125 has 30 divisors (see below), whose sum is σ = 96901794. Its totient is φ = 52728000.

The previous prime is 71508121. The next prime is 71508139. The reversal of 71508125 is 52180517.

It can be written as a sum of positive squares in 15 ways, for example, as 71132356 + 375769 = 8434^2 + 613^2 .

It is not a de Polignac number, because 71508125 - 2² = 71508121 is a prime.

It is a super-2 number, since 2×71508125² = 10226823882031250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71508121) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 105287 + ... + 105963.

Almost surely, 2^71508125 is an apocalyptic number.

It is an amenable number.

71508125 is a deficient number, since it is larger than the sum of its proper divisors (25393669).

71508125 is an equidigital number, since it uses as much as digits as its factorization.

71508125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723 (or 695 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 71508125 is about 8456.2476903175. The cubic root of 71508125 is about 415.0672460827.

The spelling of 71508125 in words is "seventy-one million, five hundred eight thousand, one hundred twenty-five".