641236 has 6 divisors (see below), whose sum is σ = 1122170. Its totient is φ = 320616.

The previous prime is 641227. The next prime is 641239. The reversal of 641236 is 632146.

It can be written as a sum of positive squares in only one way, i.e., 547600 + 93636 = 740^2 + 306^2 .

It is a super-2 number, since 2×641236² = 822367215392, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80151 + ... + 80158.

2⁶⁴¹²³⁶ is an apocalyptic number.

It is an amenable number.

641236 is a deficient number, since it is larger than the sum of its proper divisors (480934).

641236 is a wasteful number, since it uses less digits than its factorization.

641236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160313 (or 160311 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

The square root of 641236 is about 800.7721273871. The cubic root of 641236 is about 86.2328286197.

The spelling of 641236 in words is "six hundred forty-one thousand, two hundred thirty-six".