72101292 has 24 divisors (see below), whose sum is σ = 169354752. Its totient is φ = 23874000.

The previous prime is 72101291. The next prime is 72101311. The reversal of 72101292 is 29210127.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (72101291) 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, 18084 + ... + 21707.

It is an arithmetic number, because the mean of its divisors is an integer number (7056448).

Almost surely, 2^72101292 is an apocalyptic number.

It is an amenable number.

72101292 is an abundant number, since it is smaller than the sum of its proper divisors (97253460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72101292 is a wasteful number, since it uses less digits than its factorization.

72101292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39949 (or 39947 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 72101292 is about 8491.2479648165. The cubic root of 72101292 is about 416.2117619466.

The spelling of 72101292 in words is "seventy-two million, one hundred one thousand, two hundred ninety-two".