73145172 has 12 divisors (see below), whose sum is σ = 170672096. Its totient is φ = 24381720.

The previous prime is 73145159. The next prime is 73145183. The reversal of 73145172 is 27154137.

It is a tau number, because it is divible by the number of its divisors (12).

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, 3047704 + ... + 3047727.

Almost surely, 2^73145172 is an apocalyptic number.

It is an amenable number.

73145172 is an abundant number, since it is smaller than the sum of its proper divisors (97526924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

73145172 is a wasteful number, since it uses less digits than its factorization.

73145172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6095438 (or 6095436 counting only the distinct ones).

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

The square root of 73145172 is about 8552.4950745382. The cubic root of 73145172 is about 418.2107786726.

The spelling of 73145172 in words is "seventy-three million, one hundred forty-five thousand, one hundred seventy-two".