25304252121 has 32 divisors (see below), whose sum is σ = 39219264000. Its totient is φ = 16107845760.

The previous prime is 25304252101. The next prime is 25304252137. The reversal of 25304252121 is 12125240352.

25304252121 is a `hidden beast` number, since 2 + 530 + 4 + 2 + 5 + 2 + 121 = 666.

It is not a de Polignac number, because 25304252121 - 2¹⁷ = 25304121049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (25304252101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 191146 + ... + 295203.

It is an arithmetic number, because the mean of its divisors is an integer number (1225602000).

Almost surely, 2^25304252121 is an apocalyptic number.

It is an amenable number.

25304252121 is a deficient number, since it is larger than the sum of its proper divisors (13915011879).

25304252121 is a wasteful number, since it uses less digits than its factorization.

25304252121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486446 (or 486440 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 25304252121 its reverse (12125240352), we get a palindrome (37429492473).

The spelling of 25304252121 in words is "twenty-five billion, three hundred four million, two hundred fifty-two thousand, one hundred twenty-one".