25421250127 has 24 divisors (see below), whose sum is σ = 33522543600. Its totient is φ = 19054901376.

The previous prime is 25421250097. The next prime is 25421250143. The reversal of 25421250127 is 72105212452.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-25421250127 is a prime.

It is a super-2 number, since 2×25421250127² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25421254127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1038102 + ... + 1062307.

It is an arithmetic number, because the mean of its divisors is an integer number (1396772650).

Almost surely, 2^25421250127 is an apocalyptic number.

25421250127 is a deficient number, since it is larger than the sum of its proper divisors (8101293473).

25421250127 is a wasteful number, since it uses less digits than its factorization.

25421250127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100455 (or 2100448 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 31.

Adding to 25421250127 its reverse (72105212452), we get a palindrome (97526462579).

The spelling of 25421250127 in words is "twenty-five billion, four hundred twenty-one million, two hundred fifty thousand, one hundred twenty-seven".