25712749 has 2 divisors, whose sum is σ = 25712750. Its totient is φ = 25712748.

The previous prime is 25712711. The next prime is 25712759. The reversal of 25712749 is 94721752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25431849 + 280900 = 5043^2 + 530^2 .

It is a cyclic number.

It is not a de Polignac number, because 25712749 - 2¹³ = 25704557 is a prime.

It is a super-2 number, since 2×25712749² = 1322290922274002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25712759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12856374 + 12856375.

It is an arithmetic number, because the mean of its divisors is an integer number (12856375).

Almost surely, 2^25712749 is an apocalyptic number.

It is an amenable number.

25712749 is a deficient number, since it is larger than the sum of its proper divisors (1).

25712749 is an equidigital number, since it uses as much as digits as its factorization.

25712749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 37.

The square root of 25712749 is about 5070.7740040353. The cubic root of 25712749 is about 295.1545642194.

The spelling of 25712749 in words is "twenty-five million, seven hundred twelve thousand, seven hundred forty-nine".