172574420 has 24 divisors (see below), whose sum is σ = 364508424. Its totient is φ = 68629376.

The previous prime is 172574417. The next prime is 172574431. The reversal of 172574420 is 24475271.

It can be written as a sum of positive squares in 4 ways, for example, as 9909904 + 162664516 = 3148^2 + 12754^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21479 + ... + 28398.

It is an arithmetic number, because the mean of its divisors is an integer number (15187851).

Almost surely, 2^172574420 is an apocalyptic number.

172574420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172574420 is an abundant number, since it is smaller than the sum of its proper divisors (191934004).

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

172574420 is a wasteful number, since it uses less digits than its factorization.

172574420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50059 (or 50057 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 32.

The square root of 172574420 is about 13136.7583520441. The cubic root of 172574420 is about 556.7481818947.

The spelling of 172574420 in words is "one hundred seventy-two million, five hundred seventy-four thousand, four hundred twenty".