172134720 has 280 divisors, whose sum is σ = 636193800. Its totient is φ = 44126208.

The previous prime is 172134713. The next prime is 172134751. The reversal of 172134720 is 27431271.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 53934336 + 118200384 = 7344^2 + 10872^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 751566 + ... + 751794.

Almost surely, 2^172134720 is an apocalyptic number.

172134720 is a gapful number since it is divisible by the number (10) 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 172134720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318096900).

172134720 is an abundant number, since it is smaller than the sum of its proper divisors (464059080).

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

172134720 is a wasteful number, since it uses less digits than its factorization.

172134720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 172134720 is about 13120.0121951163. The cubic root of 172134720 is about 556.2749360534.

Adding to 172134720 its reverse (27431271), we get a palindrome (199565991).

The spelling of 172134720 in words is "one hundred seventy-two million, one hundred thirty-four thousand, seven hundred twenty".