641392 has 10 divisors (see below), whose sum is σ = 1242728. Its totient is φ = 320688.

The previous prime is 641387. The next prime is 641411. The reversal of 641392 is 293146.

It is a super-2 number, since 2×641392² = 822767395328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

641392 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 as a sum of consecutive naturals, namely, 20028 + ... + 20059.

2⁶⁴¹³⁹² is an apocalyptic number.

It is an amenable number.

641392 is a deficient number, since it is larger than the sum of its proper divisors (601336).

641392 is a wasteful number, since it uses less digits than its factorization.

641392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40095 (or 40089 counting only the distinct ones).

The product of its digits is 1296, while the sum is 25.

The square root of 641392 is about 800.8695274513. The cubic root of 641392 is about 86.2398209650.

The spelling of 641392 in words is "six hundred forty-one thousand, three hundred ninety-two".