172265420 has 24 divisors (see below), whose sum is σ = 383037984. Its totient is φ = 64852736.

The previous prime is 172265417. The next prime is 172265441. The reversal of 172265420 is 24562271.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252992 + ... + 253671.

It is an arithmetic number, because the mean of its divisors is an integer number (15959916).

Almost surely, 2^172265420 is an apocalyptic number.

172265420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172265420 is an abundant number, since it is smaller than the sum of its proper divisors (210772564).

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

172265420 is a wasteful number, since it uses less digits than its factorization.

172265420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506689 (or 506687 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 172265420 is about 13124.9921904739. The cubic root of 172265420 is about 556.4156915819.

The spelling of 172265420 in words is "one hundred seventy-two million, two hundred sixty-five thousand, four hundred twenty".