641254269 has 4 divisors (see below), whose sum is σ = 855005696. Its totient is φ = 427502844.

The previous prime is 641254249. The next prime is 641254291. The reversal of 641254269 is 962452146.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 641254269 - 2⁸ = 641254013 is a prime.

It is a super-2 number, since 2×641254269² = 822414075021448722, 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 (641254249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106875709 + ... + 106875714.

It is an arithmetic number, because the mean of its divisors is an integer number (213751424).

Almost surely, 2^641254269 is an apocalyptic number.

It is an amenable number.

641254269 is a deficient number, since it is larger than the sum of its proper divisors (213751427).

641254269 is a wasteful number, since it uses less digits than its factorization.

641254269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213751426.

The product of its digits is 103680, while the sum is 39.

The square root of 641254269 is about 25322.9988153062. The cubic root of 641254269 is about 862.3364754470.

The spelling of 641254269 in words is "six hundred forty-one million, two hundred fifty-four thousand, two hundred sixty-nine".