72135256 has 16 divisors (see below), whose sum is σ = 135492840. Its totient is φ = 36003840.

The previous prime is 72135253. The next prime is 72135269. The reversal of 72135256 is 65253127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72135251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2985 + ... + 12376.

Almost surely, 2^72135256 is an apocalyptic number.

It is an amenable number.

72135256 is a deficient number, since it is larger than the sum of its proper divisors (63357584).

72135256 is a wasteful number, since it uses less digits than its factorization.

72135256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15954 (or 15950 counting only the distinct ones).

The product of its digits is 12600, while the sum is 31.

The square root of 72135256 is about 8493.2476709443. The cubic root of 72135256 is about 416.2771051917.

The spelling of 72135256 in words is "seventy-two million, one hundred thirty-five thousand, two hundred fifty-six".