72497271 has 48 divisors (see below), whose sum is σ = 123049472. Its totient is φ = 37160640.

The previous prime is 72497267. The next prime is 72497281. The reversal of 72497271 is 17279427.

It is not a de Polignac number, because 72497271 - 2² = 72497267 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72497221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 261585 + ... + 261861.

Almost surely, 2^72497271 is an apocalyptic number.

72497271 is a deficient number, since it is larger than the sum of its proper divisors (50552201).

72497271 is a wasteful number, since it uses less digits than its factorization.

72497271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412 (or 401 counting only the distinct ones).

The product of its digits is 49392, while the sum is 39.

The square root of 72497271 is about 8514.5329290572. The cubic root of 72497271 is about 416.9723138345.

The spelling of 72497271 in words is "seventy-two million, four hundred ninety-seven thousand, two hundred seventy-one".