172942566 has 32 divisors (see below), whose sum is σ = 361670400. Its totient is φ = 55027104.

The previous prime is 172942559. The next prime is 172942571. The reversal of 172942566 is 665249271.

It is a super-2 number, since 2×172942566² = 59818262269328712, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87760 + ... + 89708.

It is an arithmetic number, because the mean of its divisors is an integer number (11302200).

Almost surely, 2^172942566 is an apocalyptic number.

172942566 is an abundant number, since it is smaller than the sum of its proper divisors (188727834).

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

172942566 is a wasteful number, since it uses less digits than its factorization.

172942566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2620.

The product of its digits is 181440, while the sum is 42.

The square root of 172942566 is about 13150.7629436470. The cubic root of 172942566 is about 557.1437968050.

The spelling of 172942566 in words is "one hundred seventy-two million, nine hundred forty-two thousand, five hundred sixty-six".