72256129 has 8 divisors (see below), whose sum is σ = 79401888. Its totient is φ = 65206560.

The previous prime is 72256127. The next prime is 72256181. The reversal of 72256129 is 92165227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72256129 - 2¹ = 72256127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72256094 and 72256103.

It is not an unprimeable number, because it can be changed into a prime (72256127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22467 + ... + 25480.

It is an arithmetic number, because the mean of its divisors is an integer number (9925236).

Almost surely, 2^72256129 is an apocalyptic number.

It is an amenable number.

72256129 is a deficient number, since it is larger than the sum of its proper divisors (7145759).

72256129 is a wasteful number, since it uses less digits than its factorization.

72256129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48095.

The product of its digits is 15120, while the sum is 34.

The square root of 72256129 is about 8500.3605217661. The cubic root of 72256129 is about 416.5094861715.

The spelling of 72256129 in words is "seventy-two million, two hundred fifty-six thousand, one hundred twenty-nine".