172540 has 12 divisors (see below), whose sum is σ = 362376. Its totient is φ = 69008.

The previous prime is 172519. The next prime is 172541. The reversal of 172540 is 45271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4294 + ... + 4333.

It is an arithmetic number, because the mean of its divisors is an integer number (30198).

2¹⁷²⁵⁴⁰ is an apocalyptic number.

172540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172540 is an abundant number, since it is smaller than the sum of its proper divisors (189836).

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

172540 is a wasteful number, since it uses less digits than its factorization.

172540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8636 (or 8634 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 172540 is about 415.3793446959. The cubic root of 172540 is about 55.6711164924.

The spelling of 172540 in words is "one hundred seventy-two thousand, five hundred forty".