172490426 has 8 divisors (see below), whose sum is σ = 261297684. Its totient is φ = 85391200.

The previous prime is 172490419. The next prime is 172490443. The reversal of 172490426 is 624094271.

It can be written as a sum of positive squares in 2 ways, for example, as 153784801 + 18705625 = 12401^2 + 4325^2 .

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

It is a super-2 number, since 2×172490426² = 59505894123322952, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 426755 + ... + 427158.

Almost surely, 2^172490426 is an apocalyptic number.

172490426 is a deficient number, since it is larger than the sum of its proper divisors (88807258).

172490426 is a wasteful number, since it uses less digits than its factorization.

172490426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854016.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 172490426 is about 13133.5610555553. The cubic root of 172490426 is about 556.6578419404.

The spelling of 172490426 in words is "one hundred seventy-two million, four hundred ninety thousand, four hundred twenty-six".