172974530 has 8 divisors (see below), whose sum is σ = 311354172. Its totient is φ = 69189808.

The previous prime is 172974517. The next prime is 172974533. The reversal of 172974530 is 35479271.

It can be written as a sum of positive squares in 2 ways, for example, as 164685889 + 8288641 = 12833^2 + 2879^2 .

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

It is not an unprimeable number, because it can be changed into a prime (172974533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8648717 + ... + 8648736.

Almost surely, 2^172974530 is an apocalyptic number.

172974530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172974530 is a deficient number, since it is larger than the sum of its proper divisors (138379642).

172974530 is a wasteful number, since it uses less digits than its factorization.

172974530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17297460.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 172974530 is about 13151.9781782057. The cubic root of 172974530 is about 557.1781192735.

The spelling of 172974530 in words is "one hundred seventy-two million, nine hundred seventy-four thousand, five hundred thirty".