25198751 has 2 divisors, whose sum is σ = 25198752. Its totient is φ = 25198750.

The previous prime is 25198727. The next prime is 25198759. The reversal of 25198751 is 15789152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25198751 - 2²² = 21004447 is a prime.

It is equal to p_1577576 and since 25198751 and 1577576 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25198759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12599375 + 12599376.

It is an arithmetic number, because the mean of its divisors is an integer number (12599376).

Almost surely, 2^25198751 is an apocalyptic number.

25198751 is a deficient number, since it is larger than the sum of its proper divisors (1).

25198751 is an equidigital number, since it uses as much as digits as its factorization.

25198751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 38.

The square root of 25198751 is about 5019.8357542852. The cubic root of 25198751 is about 293.1745980300.

The spelling of 25198751 in words is "twenty-five million, one hundred ninety-eight thousand, seven hundred fifty-one".