123257172 has 24 divisors (see below), whose sum is σ = 287817376. Its totient is φ = 41054688.

The previous prime is 123257159. The next prime is 123257179. The reversal of 123257172 is 271752321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123257179) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17283 + ... + 23349.

Almost surely, 2^123257172 is an apocalyptic number.

123257172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123257172 is an abundant number, since it is smaller than the sum of its proper divisors (164560204).

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

123257172 is a wasteful number, since it uses less digits than its factorization.

123257172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7767 (or 7765 counting only the distinct ones).

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

The square root of 123257172 is about 11102.1246615231. The cubic root of 123257172 is about 497.6653450731.

The spelling of 123257172 in words is "one hundred twenty-three million, two hundred fifty-seven thousand, one hundred seventy-two".