172143252 has 48 divisors (see below), whose sum is σ = 447018880. Its totient is φ = 57288384.

The previous prime is 172143229. The next prime is 172143259. The reversal of 172143252 is 252341271.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172143259) 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 15 ways as a sum of consecutive naturals, for example, 110793 + ... + 112335.

Almost surely, 2^172143252 is an apocalyptic number.

172143252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

172143252 is an abundant number, since it is smaller than the sum of its proper divisors (274875628).

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

172143252 is a wasteful number, since it uses less digits than its factorization.

172143252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2589 (or 2581 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 172143252 is about 13120.3373432241. The cubic root of 172143252 is about 556.2841266442.

The spelling of 172143252 in words is "one hundred seventy-two million, one hundred forty-three thousand, two hundred fifty-two".