641402425 has 12 divisors (see below), whose sum is σ = 822765420. Its totient is φ = 495427520.

The previous prime is 641402387. The next prime is 641402429. The reversal of 641402425 is 524204146.

It can be written as a sum of positive squares in 6 ways, for example, as 19598329 + 621804096 = 4427^2 + 24936^2 .

It is not a de Polignac number, because 641402425 - 2¹⁵ = 641369657 is a prime.

It is a super-2 number, since 2×641402425² = 822794141591761250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641402393 and 641402402.

It is not an unprimeable number, because it can be changed into a prime (641402429) 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, 441622 + ... + 443071.

It is an arithmetic number, because the mean of its divisors is an integer number (68563785).

Almost surely, 2^641402425 is an apocalyptic number.

It is an amenable number.

641402425 is a deficient number, since it is larger than the sum of its proper divisors (181362995).

641402425 is a wasteful number, since it uses less digits than its factorization.

641402425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884732 (or 884727 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 641402425 is about 25325.9239712987. The cubic root of 641402425 is about 862.4028820145.

The spelling of 641402425 in words is "six hundred forty-one million, four hundred two thousand, four hundred twenty-five".