25256447 has 2 divisors, whose sum is σ = 25256448. Its totient is φ = 25256446.

The previous prime is 25256431. The next prime is 25256479. The reversal of 25256447 is 74465252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25256447 - 2⁴ = 25256431 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25256347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12628223 + 12628224.

It is an arithmetic number, because the mean of its divisors is an integer number (12628224).

Almost surely, 2^25256447 is an apocalyptic number.

25256447 is a deficient number, since it is larger than the sum of its proper divisors (1).

25256447 is an equidigital number, since it uses as much as digits as its factorization.

25256447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67200, while the sum is 35.

The square root of 25256447 is about 5025.5792700941. The cubic root of 25256447 is about 293.3981819722.

The spelling of 25256447 in words is "twenty-five million, two hundred fifty-six thousand, four hundred forty-seven".