72575645 has 4 divisors (see below), whose sum is σ = 87090780. Its totient is φ = 58060512.

The previous prime is 72575627. The next prime is 72575663. The reversal of 72575645 is 54657527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54657527 = 4937 ⋅11071.

It is an interprime number because it is at equal distance from previous prime (72575627) and next prime (72575663).

It can be written as a sum of positive squares in 2 ways, for example, as 27269284 + 45306361 = 5222^2 + 6731^2 .

It is a cyclic number.

It is not a de Polignac number, because 72575645 - 2²⁴ = 55798429 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7257560 + ... + 7257569.

It is an arithmetic number, because the mean of its divisors is an integer number (21772695).

Almost surely, 2^72575645 is an apocalyptic number.

It is an amenable number.

72575645 is a deficient number, since it is larger than the sum of its proper divisors (14515135).

72575645 is a wasteful number, since it uses less digits than its factorization.

72575645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14515134.

The product of its digits is 294000, while the sum is 41.

The square root of 72575645 is about 8519.1340522379. The cubic root of 72575645 is about 417.1225172764.

The spelling of 72575645 in words is "seventy-two million, five hundred seventy-five thousand, six hundred forty-five".