25999451 has 2 divisors, whose sum is σ = 25999452. Its totient is φ = 25999450.

The previous prime is 25999447. The next prime is 25999459. The reversal of 25999451 is 15499952.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25999451 - 2² = 25999447 is a prime.

It is not a weakly prime, because it can be changed into another prime (25999459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12999725 + 12999726.

It is an arithmetic number, because the mean of its divisors is an integer number (12999726).

Almost surely, 2^25999451 is an apocalyptic number.

25999451 is a deficient number, since it is larger than the sum of its proper divisors (1).

25999451 is an equidigital number, since it uses as much as digits as its factorization.

25999451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145800, while the sum is 44.

The square root of 25999451 is about 5098.9656794295. The cubic root of 25999451 is about 296.2475216846.

The spelling of 25999451 in words is "twenty-five million, nine hundred ninety-nine thousand, four hundred fifty-one".