641902 has 8 divisors (see below), whose sum is σ = 970200. Its totient is φ = 318504.

The previous prime is 641897. The next prime is 641909. The reversal of 641902 is 209146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 877 + ... + 1432.

It is an arithmetic number, because the mean of its divisors is an integer number (121275).

2⁶⁴¹⁹⁰² is an apocalyptic number.

641902 is a deficient number, since it is larger than the sum of its proper divisors (328298).

641902 is a wasteful number, since it uses less digits than its factorization.

641902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2450.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 641902 is about 801.1878681059. The cubic root of 641902 is about 86.2626726461.

The spelling of 641902 in words is "six hundred forty-one thousand, nine hundred two".