172121076 has 36 divisors (see below), whose sum is σ = 457984800. Its totient is φ = 54353808.

The previous prime is 172121071. The next prime is 172121093. The reversal of 172121076 is 670121271.

172121076 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172121071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 125136 + ... + 126503.

It is an arithmetic number, because the mean of its divisors is an integer number (12721800).

Almost surely, 2^172121076 is an apocalyptic number.

It is an amenable number.

172121076 is an abundant number, since it is smaller than the sum of its proper divisors (285863724).

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

172121076 is a wasteful number, since it uses less digits than its factorization.

172121076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251668 (or 251663 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

The square root of 172121076 is about 13119.4922157834. The cubic root of 172121076 is about 556.2602382326.

The spelling of 172121076 in words is "one hundred seventy-two million, one hundred twenty-one thousand, seventy-six".