25051121 has 2 divisors, whose sum is σ = 25051122. Its totient is φ = 25051120.

The previous prime is 25051087. The next prime is 25051127. The reversal of 25051121 is 12115052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14714896 + 10336225 = 3836^2 + 3215^2 .

It is a cyclic number.

It is not a de Polignac number, because 25051121 - 2¹⁰ = 25050097 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25051121.

It is not a weakly prime, because it can be changed into another prime (25051127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12525560 + 12525561.

It is an arithmetic number, because the mean of its divisors is an integer number (12525561).

Almost surely, 2^25051121 is an apocalyptic number.

It is an amenable number.

25051121 is a deficient number, since it is larger than the sum of its proper divisors (1).

25051121 is an equidigital number, since it uses as much as digits as its factorization.

25051121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 25051121 is about 5005.1094893119. The cubic root of 25051121 is about 292.6009430742.

Adding to 25051121 its reverse (12115052), we get a palindrome (37166173).

The spelling of 25051121 in words is "twenty-five million, fifty-one thousand, one hundred twenty-one".