72454491 has 6 divisors (see below), whose sum is σ = 104656500. Its totient is φ = 48302988.

The previous prime is 72454489. The next prime is 72454511. The reversal of 72454491 is 19445427.

It is a happy number.

72454491 is a `hidden beast` number, since 7 + 24 + 544 + 91 = 666.

It is not a de Polignac number, because 72454491 - 2¹ = 72454489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72454091) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4025241 + ... + 4025258.

It is an arithmetic number, because the mean of its divisors is an integer number (17442750).

Almost surely, 2^72454491 is an apocalyptic number.

72454491 is a deficient number, since it is larger than the sum of its proper divisors (32202009).

72454491 is a wasteful number, since it uses less digits than its factorization.

72454491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8050505 (or 8050502 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 72454491 is about 8512.0203829643. The cubic root of 72454491 is about 416.8902804688.

The spelling of 72454491 in words is "seventy-two million, four hundred fifty-four thousand, four hundred ninety-one".