25260024421 has 4 divisors (see below), whose sum is σ = 25674123244. Its totient is φ = 24845925600.

The previous prime is 25260024401. The next prime is 25260024451. The reversal of 25260024421 is 12442006252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14147913025 + 11112111396 = 118945^2 + 105414^2 .

It is a cyclic number.

It is not a de Polignac number, because 25260024421 - 2⁵ = 25260024389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25260024421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25260024401) 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, 207049320 + ... + 207049441.

It is an arithmetic number, because the mean of its divisors is an integer number (6418530811).

Almost surely, 2^25260024421 is an apocalyptic number.

It is an amenable number.

25260024421 is a deficient number, since it is larger than the sum of its proper divisors (414098823).

25260024421 is an equidigital number, since it uses as much as digits as its factorization.

25260024421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414098822.

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

The spelling of 25260024421 in words is "twenty-five billion, two hundred sixty million, twenty-four thousand, four hundred twenty-one".