641172 has 48 divisors (see below), whose sum is σ = 1814400. Its totient is φ = 172032.

The previous prime is 641167. The next prime is 641197. The reversal of 641172 is 271146.

641172 is nontrivially palindromic in base 15.

It is a super-2 number, since 2×641172² = 822203067168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

641172 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1204 + ... + 1652.

It is an arithmetic number, because the mean of its divisors is an integer number (37800).

2⁶⁴¹¹⁷² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (907200).

641172 is an abundant number, since it is smaller than the sum of its proper divisors (1173228).

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

641172 is a wasteful number, since it uses less digits than its factorization.

641172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480 (or 478 counting only the distinct ones).

The product of its digits is 336, while the sum is 21.

The square root of 641172 is about 800.7321649590. The cubic root of 641172 is about 86.2299596372.

The spelling of 641172 in words is "six hundred forty-one thousand, one hundred seventy-two".