641240025 has 96 divisors (see below), whose sum is σ = 1178496000. Its totient is φ = 306351360.

The previous prime is 641240009. The next prime is 641240029. The reversal of 641240025 is 520042146.

641240025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 641240025 - 2⁴ = 641240009 is a prime.

It is a super-2 number, since 2×641240025² = 822377539324001250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641239977 and 641240004.

It is not an unprimeable number, because it can be changed into a prime (641240029) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2438044 + ... + 2438306.

It is an arithmetic number, because the mean of its divisors is an integer number (12276000).

Almost surely, 2^641240025 is an apocalyptic number.

It is an amenable number.

641240025 is a deficient number, since it is larger than the sum of its proper divisors (537255975).

641240025 is a wasteful number, since it uses less digits than its factorization.

641240025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383 (or 378 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 641240025 is about 25322.7175674334. The cubic root of 641240025 is about 862.3300904541.

The spelling of 641240025 in words is "six hundred forty-one million, two hundred forty thousand, twenty-five".