172056120 has 32 divisors (see below), whose sum is σ = 516168720. Its totient is φ = 45881600.

The previous prime is 172056119. The next prime is 172056121. The reversal of 172056120 is 21650271.

It is an interprime number because it is at equal distance from previous prime (172056119) and next prime (172056121).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172056121) 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, 716781 + ... + 717020.

Almost surely, 2^172056120 is an apocalyptic number.

172056120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172056120 is an abundant number, since it is smaller than the sum of its proper divisors (344112600).

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

172056120 is a wasteful number, since it uses less digits than its factorization.

172056120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1433815 (or 1433811 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 172056120 is about 13117.0164290512. The cubic root of 172056120 is about 556.1902545771.

The spelling of 172056120 in words is "one hundred seventy-two million, fifty-six thousand, one hundred twenty".