641972 has 12 divisors (see below), whose sum is σ = 1182720. Its totient is φ = 304056.

The previous prime is 641969. The next prime is 641981. The reversal of 641972 is 279146.

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4148 + ... + 4299.

It is an arithmetic number, because the mean of its divisors is an integer number (98560).

2⁶⁴¹⁹⁷² is an apocalyptic number.

It is an amenable number.

641972 is a deficient number, since it is larger than the sum of its proper divisors (540748).

641972 is a wasteful number, since it uses less digits than its factorization.

641972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8470 (or 8468 counting only the distinct ones).

The product of its digits is 3024, while the sum is 29.

The square root of 641972 is about 801.2315520497. The cubic root of 641972 is about 86.2658082065.

The spelling of 641972 in words is "six hundred forty-one thousand, nine hundred seventy-two".