25012643 has 2 divisors, whose sum is σ = 25012644. Its totient is φ = 25012642.

The previous prime is 25012621. The next prime is 25012651. The reversal of 25012643 is 34621052.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25012643 - 2⁸ = 25012387 is a prime.

It is not a weakly prime, because it can be changed into another prime (25012613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12506321 + 12506322.

It is an arithmetic number, because the mean of its divisors is an integer number (12506322).

Almost surely, 2^25012643 is an apocalyptic number.

25012643 is a deficient number, since it is larger than the sum of its proper divisors (1).

25012643 is an equidigital number, since it uses as much as digits as its factorization.

25012643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 25012643 is about 5001.2641401950. The cubic root of 25012643 is about 292.4510566561.

Adding to 25012643 its reverse (34621052), we get a palindrome (59633695).

The spelling of 25012643 in words is "twenty-five million, twelve thousand, six hundred forty-three".