172257450 has 48 divisors (see below), whose sum is σ = 431639040. Its totient is φ = 45457920.

The previous prime is 172257433. The next prime is 172257457. The reversal of 172257450 is 54752271.

It is a super-3 number, since 3×172257450³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (172257457) 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 23 ways as a sum of consecutive naturals, for example, 8631 + ... + 20469.

It is an arithmetic number, because the mean of its divisors is an integer number (8992480).

Almost surely, 2^172257450 is an apocalyptic number.

172257450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 172257450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215819520).

172257450 is an abundant number, since it is smaller than the sum of its proper divisors (259381590).

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

172257450 is a wasteful number, since it uses less digits than its factorization.

172257450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11951 (or 11946 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 33.

The square root of 172257450 is about 13124.6885677337. The cubic root of 172257450 is about 556.4071104412.

The spelling of 172257450 in words is "one hundred seventy-two million, two hundred fifty-seven thousand, four hundred fifty".