72104457 has 4 divisors (see below), whose sum is σ = 96139280. Its totient is φ = 48069636.

The previous prime is 72104423. The next prime is 72104479. The reversal of 72104457 is 75440127.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 72104457 - 2⁶ = 72104393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72104407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12017407 + ... + 12017412.

It is an arithmetic number, because the mean of its divisors is an integer number (24034820).

Almost surely, 2^72104457 is an apocalyptic number.

It is an amenable number.

72104457 is a deficient number, since it is larger than the sum of its proper divisors (24034823).

72104457 is a wasteful number, since it uses less digits than its factorization.

72104457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24034822.

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 72104457 is about 8491.4343311363. The cubic root of 72104457 is about 416.2178519482.

The spelling of 72104457 in words is "seventy-two million, one hundred four thousand, four hundred fifty-seven".