25212643 has 2 divisors, whose sum is σ = 25212644. Its totient is φ = 25212642.

The previous prime is 25212637. The next prime is 25212679. The reversal of 25212643 is 34621252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25212643 - 2⁵ = 25212611 is a prime.

It is not a weakly prime, because it can be changed into another prime (25212043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12606321 + 12606322.

It is an arithmetic number, because the mean of its divisors is an integer number (12606322).

Almost surely, 2^25212643 is an apocalyptic number.

25212643 is a deficient number, since it is larger than the sum of its proper divisors (1).

25212643 is an equidigital number, since it uses as much as digits as its factorization.

25212643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 25.

The square root of 25212643 is about 5021.2192742401. The cubic root of 25212643 is about 293.2284635742.

Adding to 25212643 its reverse (34621252), we get a palindrome (59833895).

The spelling of 25212643 in words is "twenty-five million, two hundred twelve thousand, six hundred forty-three".