25526749 has 2 divisors, whose sum is σ = 25526750. Its totient is φ = 25526748.

The previous prime is 25526719. The next prime is 25526777. The reversal of 25526749 is 94762552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16345849 + 9180900 = 4043^2 + 3030^2 .

It is a cyclic number.

It is not a de Polignac number, because 25526749 - 2¹⁵ = 25493981 is a prime.

It is a super-2 number, since 2×25526749² = 1303229829018002, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25526719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12763374 + 12763375.

It is an arithmetic number, because the mean of its divisors is an integer number (12763375).

Almost surely, 2^25526749 is an apocalyptic number.

It is an amenable number.

25526749 is a deficient number, since it is larger than the sum of its proper divisors (1).

25526749 is an equidigital number, since it uses as much as digits as its factorization.

25526749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 40.

The square root of 25526749 is about 5052.4003206397. The cubic root of 25526749 is about 294.4411482352.

The spelling of 25526749 in words is "twenty-five million, five hundred twenty-six thousand, seven hundred forty-nine".