25351121 has 2 divisors, whose sum is σ = 25351122. Its totient is φ = 25351120.

The previous prime is 25351103. The next prime is 25351127. The reversal of 25351121 is 12115352.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24611521 + 739600 = 4961^2 + 860^2 .

It is a cyclic number.

It is not a de Polignac number, because 25351121 - 2⁶ = 25351057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25351093 and 25351102.

It is not a weakly prime, because it can be changed into another prime (25351127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12675560 + 12675561.

It is an arithmetic number, because the mean of its divisors is an integer number (12675561).

Almost surely, 2^25351121 is an apocalyptic number.

It is an amenable number.

25351121 is a deficient number, since it is larger than the sum of its proper divisors (1).

25351121 is an equidigital number, since it uses as much as digits as its factorization.

25351121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 300, while the sum is 20.

The square root of 25351121 is about 5034.9896722834. The cubic root of 25351121 is about 293.7643266892.

Adding to 25351121 its reverse (12115352), we get a palindrome (37466473).

The spelling of 25351121 in words is "twenty-five million, three hundred fifty-one thousand, one hundred twenty-one".