172906245 has 40 divisors (see below), whose sum is σ = 312412320. Its totient is φ = 91484640.

The previous prime is 172906187. The next prime is 172906277. The reversal of 172906245 is 542609271.

172906245 is a `hidden beast` number, since 1 + 7 + 29 + 0 + 624 + 5 = 666.

It is not a de Polignac number, because 172906245 - 2¹³ = 172898053 is a prime.

It is a congruent number.

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 39 ways as a sum of consecutive naturals, for example, 51426 + ... + 54684.

It is an arithmetic number, because the mean of its divisors is an integer number (7810308).

Almost surely, 2^172906245 is an apocalyptic number.

172906245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172906245 is a deficient number, since it is larger than the sum of its proper divisors (139506075).

172906245 is a wasteful number, since it uses less digits than its factorization.

172906245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3407 (or 3398 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 172906245 is about 13149.3819246381. The cubic root of 172906245 is about 557.1047907213.

The spelling of 172906245 in words is "one hundred seventy-two million, nine hundred six thousand, two hundred forty-five".