25398859 has 2 divisors, whose sum is σ = 25398860. Its totient is φ = 25398858.

The previous prime is 25398811. The next prime is 25398871. The reversal of 25398859 is 95889352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25398859 - 2¹³ = 25390667 is a prime.

It is not a weakly prime, because it can be changed into another prime (25398899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12699429 + 12699430.

It is an arithmetic number, because the mean of its divisors is an integer number (12699430).

Almost surely, 2^25398859 is an apocalyptic number.

25398859 is a deficient number, since it is larger than the sum of its proper divisors (1).

25398859 is an equidigital number, since it uses as much as digits as its factorization.

25398859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 777600, while the sum is 49.

The square root of 25398859 is about 5039.7280680608. The cubic root of 25398859 is about 293.9486042479.

The spelling of 25398859 in words is "twenty-five million, three hundred ninety-eight thousand, eight hundred fifty-nine".