25410420421 has 16 divisors (see below), whose sum is σ = 27749744640. Its totient is φ = 23175020800.

The previous prime is 25410420383. The next prime is 25410420437. The reversal of 25410420421 is 12402401452.

It is a cyclic number.

It is not a de Polignac number, because 25410420421 - 2²⁵ = 25376865989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25410420481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76741 + ... + 238138.

It is an arithmetic number, because the mean of its divisors is an integer number (1734359040).

Almost surely, 2^25410420421 is an apocalyptic number.

It is an amenable number.

25410420421 is a deficient number, since it is larger than the sum of its proper divisors (2339324219).

25410420421 is a wasteful number, since it uses less digits than its factorization.

25410420421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315044.

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 25410420421 its reverse (12402401452), we get a palindrome (37812821873).

The spelling of 25410420421 in words is "twenty-five billion, four hundred ten million, four hundred twenty thousand, four hundred twenty-one".