172490 has 16 divisors (see below), whose sum is σ = 317952. Its totient is φ = 67344.

The previous prime is 172489. The next prime is 172507. The reversal of 172490 is 94271.

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, 287 + ... + 653.

It is an arithmetic number, because the mean of its divisors is an integer number (19872).

2¹⁷²⁴⁹⁰ is an apocalyptic number.

172490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172490 is a deficient number, since it is larger than the sum of its proper divisors (145462).

172490 is a wasteful number, since it uses less digits than its factorization.

172490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 172490 is about 415.3191543861. The cubic root of 172490 is about 55.6657383680.

The spelling of 172490 in words is "one hundred seventy-two thousand, four hundred ninety".