65139572 has 12 divisors (see below), whose sum is σ = 114362976. Its totient is φ = 32464440.

The previous prime is 65139559. The next prime is 65139593. The reversal of 65139572 is 27593156.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24938 + ... + 27425.

It is an arithmetic number, because the mean of its divisors is an integer number (9530248).

Almost surely, 2^65139572 is an apocalyptic number.

It is an amenable number.

65139572 is a deficient number, since it is larger than the sum of its proper divisors (49223404).

65139572 is a wasteful number, since it uses less digits than its factorization.

65139572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52678 (or 52676 counting only the distinct ones).

The product of its digits is 56700, while the sum is 38.

The square root of 65139572 is about 8070.9089946548. The cubic root of 65139572 is about 402.3601551137.

The spelling of 65139572 in words is "sixty-five million, one hundred thirty-nine thousand, five hundred seventy-two".