172580545 has 8 divisors (see below), whose sum is σ = 207464040. Its totient is φ = 137819520.

The previous prime is 172580539. The next prime is 172580563. The reversal of 172580545 is 545085271.

It can be written as a sum of positive squares in 4 ways, for example, as 419904 + 172160641 = 648^2 + 13121^2 .

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

It is not a de Polignac number, because 172580545 - 2⁹ = 172580033 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 27486 + ... + 33175.

It is an arithmetic number, because the mean of its divisors is an integer number (25933005).

Almost surely, 2^172580545 is an apocalyptic number.

It is an amenable number.

172580545 is a deficient number, since it is larger than the sum of its proper divisors (34883495).

172580545 is an equidigital number, since it uses as much as digits as its factorization.

172580545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61235.

The product of its (nonzero) digits is 56000, while the sum is 37.

The square root of 172580545 is about 13136.9914744587. The cubic root of 172580545 is about 556.7547685067.

The spelling of 172580545 in words is "one hundred seventy-two million, five hundred eighty thousand, five hundred forty-five".