172154745 has 24 divisors (see below), whose sum is σ = 341030976. Its totient is φ = 78699168.

The previous prime is 172154737. The next prime is 172154771. The reversal of 172154745 is 547451271.

172154745 is a `hidden beast` number, since 1 + 72 + 1 + 547 + 45 = 666.

It is not a de Polignac number, because 172154745 - 2³ = 172154737 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 272947 + ... + 273576.

It is an arithmetic number, because the mean of its divisors is an integer number (14209624).

Almost surely, 2^172154745 is an apocalyptic number.

172154745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172154745 is a deficient number, since it is larger than the sum of its proper divisors (168876231).

172154745 is a wasteful number, since it uses less digits than its factorization.

172154745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546541 (or 546538 counting only the distinct ones).

The product of its digits is 39200, while the sum is 36.

The square root of 172154745 is about 13120.7753200792. The cubic root of 172154745 is about 556.2965063166.

The spelling of 172154745 in words is "one hundred seventy-two million, one hundred fifty-four thousand, seven hundred forty-five".