25638751 has 2 divisors, whose sum is σ = 25638752. Its totient is φ = 25638750.

The previous prime is 25638713. The next prime is 25638757. The reversal of 25638751 is 15783652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25638751 - 2¹³ = 25630559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25638751.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25638757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12819375 + 12819376.

It is an arithmetic number, because the mean of its divisors is an integer number (12819376).

Almost surely, 2^25638751 is an apocalyptic number.

25638751 is a deficient number, since it is larger than the sum of its proper divisors (1).

25638751 is an equidigital number, since it uses as much as digits as its factorization.

25638751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 37.

The square root of 25638751 is about 5063.4722276319. The cubic root of 25638751 is about 294.8711531545.

The spelling of 25638751 in words is "twenty-five million, six hundred thirty-eight thousand, seven hundred fifty-one".