172170424 has 16 divisors (see below), whose sum is σ = 341809200. Its totient is φ = 81021312.

The previous prime is 172170421. The next prime is 172170431. The reversal of 172170424 is 424071271.

It is a junction number, because it is equal to n+sod(n) for n = 172170392 and 172170401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172170421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 632844 + ... + 633115.

It is an arithmetic number, because the mean of its divisors is an integer number (21363075).

Almost surely, 2^172170424 is an apocalyptic number.

It is an amenable number.

172170424 is a deficient number, since it is larger than the sum of its proper divisors (169638776).

172170424 is a wasteful number, since it uses less digits than its factorization.

172170424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1265982 (or 1265978 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 172170424 is about 13121.3727940334. The cubic root of 172170424 is about 556.3133940458.

The spelling of 172170424 in words is "one hundred seventy-two million, one hundred seventy thousand, four hundred twenty-four".