71297564 has 12 divisors (see below), whose sum is σ = 134368584. Its totient is φ = 32906544.

The previous prime is 71297563. The next prime is 71297591. The reversal of 71297564 is 46579217.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71297563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 685502 + ... + 685605.

It is an arithmetic number, because the mean of its divisors is an integer number (11197382).

Almost surely, 2^71297564 is an apocalyptic number.

It is an amenable number.

71297564 is a deficient number, since it is larger than the sum of its proper divisors (63071020).

71297564 is a wasteful number, since it uses less digits than its factorization.

71297564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371124 (or 1371122 counting only the distinct ones).

The product of its digits is 105840, while the sum is 41.

The square root of 71297564 is about 8443.7884862187. The cubic root of 71297564 is about 414.6594467484.

The spelling of 71297564 in words is "seventy-one million, two hundred ninety-seven thousand, five hundred sixty-four".