641361 has 12 divisors (see below), whose sum is σ = 994992. Its totient is φ = 366408.

The previous prime is 641327. The next prime is 641371. The reversal of 641361 is 163146.

It is not a de Polignac number, because 641361 - 2¹⁴ = 624977 is a prime.

It is a super-2 number, since 2×641361² = 822687864642, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 641361.

It is not an unprimeable number, because it can be changed into a prime (641371) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2035 + ... + 2328.

It is an arithmetic number, because the mean of its divisors is an integer number (82916).

2⁶⁴¹³⁶¹ is an apocalyptic number.

It is an amenable number.

641361 is a deficient number, since it is larger than the sum of its proper divisors (353631).

641361 is a wasteful number, since it uses less digits than its factorization.

641361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4380 (or 4373 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

The square root of 641361 is about 800.8501732534. The cubic root of 641361 is about 86.2384315507.

It can be divided in two parts, 6413 and 61, that multiplied together give a palindrome (391193).

The spelling of 641361 in words is "six hundred forty-one thousand, three hundred sixty-one".