172371492 has 18 divisors (see below), whose sum is σ = 435716918. Its totient is φ = 57457152.

The previous prime is 172371487. The next prime is 172371497. The reversal of 172371492 is 294173271.

It is an interprime number because it is at equal distance from previous prime (172371487) and next prime (172371497).

It can be written as a sum of positive squares in only one way, i.e., 160427556 + 11943936 = 12666^2 + 3456^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 4788097 = 172371492 / (1 + 7 + 2 + 3 + 7 + 1 + 4 + 9 + 2).

It is not an unprimeable number, because it can be changed into a prime (172371497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2394013 + ... + 2394084.

Almost surely, 2^172371492 is an apocalyptic number.

172371492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

172371492 is an abundant number, since it is smaller than the sum of its proper divisors (263345426).

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

172371492 is a wasteful number, since it uses less digits than its factorization.

172371492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4788107 (or 4788102 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 172371492 is about 13129.0324091305. The cubic root of 172371492 is about 556.5298720049.

The spelling of 172371492 in words is "one hundred seventy-two million, three hundred seventy-one thousand, four hundred ninety-two".