172490158 has 8 divisors (see below), whose sum is σ = 263120760. Its totient is φ = 84783240.

The previous prime is 172490137. The next prime is 172490159. The reversal of 172490158 is 851094271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172490159) 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, 730773 + ... + 731008.

It is an arithmetic number, because the mean of its divisors is an integer number (32890095).

Almost surely, 2^172490158 is an apocalyptic number.

172490158 is a deficient number, since it is larger than the sum of its proper divisors (90630602).

172490158 is a wasteful number, since it uses less digits than its factorization.

172490158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461842.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 172490158 is about 13133.5508526826. The cubic root of 172490158 is about 556.6575536454.

The spelling of 172490158 in words is "one hundred seventy-two million, four hundred ninety thousand, one hundred fifty-eight".