172621074 has 16 divisors (see below), whose sum is σ = 345512160. Its totient is φ = 57495360.

The previous prime is 172621073. The next prime is 172621087. The reversal of 172621074 is 470126271.

172621074 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (172621073) 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, 2404 + ... + 18735.

It is an arithmetic number, because the mean of its divisors is an integer number (21594510).

Almost surely, 2^172621074 is an apocalyptic number.

172621074 is an abundant number, since it is smaller than the sum of its proper divisors (172891086).

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

172621074 is a wasteful number, since it uses less digits than its factorization.

172621074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22505.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 172621074 is about 13138.5339364786. The cubic root of 172621074 is about 556.7983480575.

It can be divided in two parts, 17262 and 1074, that added together give a triangular number (18336 = T₁₉₁).

The spelling of 172621074 in words is "one hundred seventy-two million, six hundred twenty-one thousand, seventy-four".