25170749 has 2 divisors, whose sum is σ = 25170750. Its totient is φ = 25170748.

The previous prime is 25170731. The next prime is 25170773. The reversal of 25170749 is 94707152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23454649 + 1716100 = 4843^2 + 1310^2 .

It is a cyclic number.

It is not a de Polignac number, because 25170749 - 2²⁴ = 8393533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25170779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12585374 + 12585375.

It is an arithmetic number, because the mean of its divisors is an integer number (12585375).

Almost surely, 2^25170749 is an apocalyptic number.

It is an amenable number.

25170749 is a deficient number, since it is larger than the sum of its proper divisors (1).

25170749 is an equidigital number, since it uses as much as digits as its factorization.

25170749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 25170749 is about 5017.0458439205. The cubic root of 25170749 is about 293.0659614566.

The spelling of 25170749 in words is "twenty-five million, one hundred seventy thousand, seven hundred forty-nine".