25864499 has 2 divisors, whose sum is σ = 25864500. Its totient is φ = 25864498.

The previous prime is 25864483. The next prime is 25864507. The reversal of 25864499 is 99446852.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25864499 - 2⁴ = 25864483 is a prime.

It is not a weakly prime, because it can be changed into another prime (25864409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12932249 + 12932250.

It is an arithmetic number, because the mean of its divisors is an integer number (12932250).

Almost surely, 2^25864499 is an apocalyptic number.

25864499 is a deficient number, since it is larger than the sum of its proper divisors (1).

25864499 is an equidigital number, since it uses as much as digits as its factorization.

25864499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 47.

The square root of 25864499 is about 5085.7151906099. The cubic root of 25864499 is about 295.7340676720.

The spelling of 25864499 in words is "twenty-five million, eight hundred sixty-four thousand, four hundred ninety-nine".