25456489 has 2 divisors, whose sum is σ = 25456490. Its totient is φ = 25456488.

The previous prime is 25456441. The next prime is 25456493. The reversal of 25456489 is 98465452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23474025 + 1982464 = 4845^2 + 1408^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25456489 is a prime.

It is not a weakly prime, because it can be changed into another prime (25456499) 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, 12728244 + 12728245.

It is an arithmetic number, because the mean of its divisors is an integer number (12728245).

Almost surely, 2^25456489 is an apocalyptic number.

It is an amenable number.

25456489 is a deficient number, since it is larger than the sum of its proper divisors (1).

25456489 is an equidigital number, since it uses as much as digits as its factorization.

25456489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 345600, while the sum is 43.

The square root of 25456489 is about 5045.4423988388. The cubic root of 25456489 is about 294.1707593942.

The spelling of 25456489 in words is "twenty-five million, four hundred fifty-six thousand, four hundred eighty-nine".