641356 has 12 divisors (see below), whose sum is σ = 1133440. Its totient is φ = 317520.

The previous prime is 641327. The next prime is 641371. The reversal of 641356 is 653146.

It is a super-2 number, since 2×641356² = 822675037472, which contains 22 as substring.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 641356.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300 + ... + 1171.

2⁶⁴¹³⁵⁶ is an apocalyptic number.

641356 is the 507-th centered pentagonal number.

It is an amenable number.

641356 is a deficient number, since it is larger than the sum of its proper divisors (492084).

641356 is a wasteful number, since it uses less digits than its factorization.

641356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1584 (or 1582 counting only the distinct ones).

The product of its digits is 2160, while the sum is 25.

The square root of 641356 is about 800.8470515648. The cubic root of 641356 is about 86.2382074475.

It can be divided in two parts, 6413 and 56, that multiplied together give a triangular number (359128 = T₈₄₇).

The spelling of 641356 in words is "six hundred forty-one thousand, three hundred fifty-six".