25572749 has 2 divisors, whose sum is σ = 25572750. Its totient is φ = 25572748.

The previous prime is 25572739. The next prime is 25572769. The reversal of 25572749 is 94727552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18550249 + 7022500 = 4307^2 + 2650^2 .

It is a cyclic number.

It is not a de Polignac number, because 25572749 - 2²⁰ = 24524173 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25572719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12786374 + 12786375.

It is an arithmetic number, because the mean of its divisors is an integer number (12786375).

Almost surely, 2^25572749 is an apocalyptic number.

It is an amenable number.

25572749 is a deficient number, since it is larger than the sum of its proper divisors (1).

25572749 is an equidigital number, since it uses as much as digits as its factorization.

25572749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 176400, while the sum is 41.

The square root of 25572749 is about 5056.9505633336. The cubic root of 25572749 is about 294.6179061556.

The spelling of 25572749 in words is "twenty-five million, five hundred seventy-two thousand, seven hundred forty-nine".