25580749 has 2 divisors, whose sum is σ = 25580750. Its totient is φ = 25580748.

The previous prime is 25580741. The next prime is 25580773. The reversal of 25580749 is 94708552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22184100 + 3396649 = 4710^2 + 1843^2 .

It is a cyclic number.

It is not a de Polignac number, because 25580749 - 2³ = 25580741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25580741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12790374 + 12790375.

It is an arithmetic number, because the mean of its divisors is an integer number (12790375).

Almost surely, 2^25580749 is an apocalyptic number.

It is an amenable number.

25580749 is a deficient number, since it is larger than the sum of its proper divisors (1).

25580749 is an equidigital number, since it uses as much as digits as its factorization.

25580749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 25580749 is about 5057.7414920100. The cubic root of 25580749 is about 294.6486250212.

The spelling of 25580749 in words is "twenty-five million, five hundred eighty thousand, seven hundred forty-nine".