72451173 has 16 divisors (see below), whose sum is σ = 103150080. Its totient is φ = 45124464.

The previous prime is 72451157. The next prime is 72451207. The reversal of 72451173 is 37115427.

It is not a de Polignac number, because 72451173 - 2⁴ = 72451157 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72451173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72451133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9243 + ... + 15176.

It is an arithmetic number, because the mean of its divisors is an integer number (6446880).

Almost surely, 2^72451173 is an apocalyptic number.

It is an amenable number.

72451173 is a deficient number, since it is larger than the sum of its proper divisors (30698907).

72451173 is a wasteful number, since it uses less digits than its factorization.

72451173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24488.

The product of its digits is 5880, while the sum is 30.

The square root of 72451173 is about 8511.8254798839. The cubic root of 72451173 is about 416.8839166440.

The spelling of 72451173 in words is "seventy-two million, four hundred fifty-one thousand, one hundred seventy-three".