145731172 has 12 divisors (see below), whose sum is σ = 255540096. Its totient is φ = 72719720.

The previous prime is 145731167. The next prime is 145731211. The reversal of 145731172 is 271137541.

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, 34204 + ... + 38227.

It is an arithmetic number, because the mean of its divisors is an integer number (21295008).

Almost surely, 2^145731172 is an apocalyptic number.

It is an amenable number.

145731172 is a deficient number, since it is larger than the sum of its proper divisors (109808924).

145731172 is a wasteful number, since it uses less digits than its factorization.

145731172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72938 (or 72936 counting only the distinct ones).

The product of its digits is 5880, while the sum is 31.

The square root of 145731172 is about 12071.9166663790. The cubic root of 145731172 is about 526.2403591458.

The spelling of 145731172 in words is "one hundred forty-five million, seven hundred thirty-one thousand, one hundred seventy-two".