25212401 has 2 divisors, whose sum is σ = 25212402. Its totient is φ = 25212400.

The previous prime is 25212389. The next prime is 25212403. The reversal of 25212401 is 10421252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19571776 + 5640625 = 4424^2 + 2375^2 .

It is a cyclic number.

It is not a de Polignac number, because 25212401 - 2²² = 21018097 is a prime.

Together with 25212403, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25212401.

It is not a weakly prime, because it can be changed into another prime (25212403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12606200 + 12606201.

It is an arithmetic number, because the mean of its divisors is an integer number (12606201).

Almost surely, 2^25212401 is an apocalyptic number.

It is an amenable number.

25212401 is a deficient number, since it is larger than the sum of its proper divisors (1).

25212401 is an equidigital number, since it uses as much as digits as its factorization.

25212401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 25212401 is about 5021.1951764495. The cubic root of 25212401 is about 293.2275254005.

Adding to 25212401 its reverse (10421252), we get a palindrome (35633653).

The spelling of 25212401 in words is "twenty-five million, two hundred twelve thousand, four hundred one".