641222405 has 32 divisors (see below), whose sum is σ = 853244928. Its totient is φ = 460134400.

The previous prime is 641222401. The next prime is 641222419. The reversal of 641222405 is 504222146.

It is not a de Polignac number, because 641222405 - 2² = 641222401 is a prime.

It is a super-2 number, since 2×641222405² = 822332345347968050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641222401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 842225 + ... + 842985.

It is an arithmetic number, because the mean of its divisors is an integer number (26663904).

Almost surely, 2^641222405 is an apocalyptic number.

It is an amenable number.

641222405 is a deficient number, since it is larger than the sum of its proper divisors (212022523).

641222405 is a wasteful number, since it uses less digits than its factorization.

641222405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 641222405 is about 25322.3696560966. The cubic root of 641222405 is about 862.3221920101.

The spelling of 641222405 in words is "six hundred forty-one million, two hundred twenty-two thousand, four hundred five".