172645452 has 96 divisors (see below), whose sum is σ = 533836800. Its totient is φ = 47177856.

The previous prime is 172645423. The next prime is 172645477. The reversal of 172645452 is 254546271.

It is a happy number.

172645452 is a `hidden beast` number, since 1 + 7 + 2 + 645 + 4 + 5 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12424 + ... + 22352.

It is an arithmetic number, because the mean of its divisors is an integer number (5560800).

Almost surely, 2^172645452 is an apocalyptic number.

172645452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172645452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266918400).

172645452 is an abundant number, since it is smaller than the sum of its proper divisors (361191348).

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

172645452 is a wasteful number, since it uses less digits than its factorization.

172645452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9972 (or 9964 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 172645452 is about 13139.4616328067. The cubic root of 172645452 is about 556.8245576639.

The spelling of 172645452 in words is "one hundred seventy-two million, six hundred forty-five thousand, four hundred fifty-two".