172340 has 24 divisors (see below), whose sum is σ = 413952. Its totient is φ = 59040.

The previous prime is 172331. The next prime is 172343. The reversal of 172340 is 43271.

It is a happy number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172343) by changing a digit.

172340 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 476 + ... + 755.

It is an arithmetic number, because the mean of its divisors is an integer number (17248).

2¹⁷²³⁴⁰ is an apocalyptic number.

172340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172340 is an abundant number, since it is smaller than the sum of its proper divisors (241612).

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

172340 is a wasteful number, since it uses less digits than its factorization.

172340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247 (or 1245 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 172340 is about 415.1385310953. The cubic root of 172340 is about 55.6495977564.

It can be divided in two parts, 172 and 340, that added together give a 9-th power (512 = 2⁹).

The spelling of 172340 in words is "one hundred seventy-two thousand, three hundred forty", and thus it is an iban number.