25126681 has 2 divisors, whose sum is σ = 25126682. Its totient is φ = 25126680.

The previous prime is 25126669. The next prime is 25126723. The reversal of 25126681 is 18662152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14784025 + 10342656 = 3845^2 + 3216^2 .

It is a cyclic number.

It is not a de Polignac number, because 25126681 - 2⁷ = 25126553 is a prime.

It is a super-2 number, since 2×25126681² = 1262700196151522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25129681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12563340 + 12563341.

It is an arithmetic number, because the mean of its divisors is an integer number (12563341).

Almost surely, 2^25126681 is an apocalyptic number.

It is an amenable number.

25126681 is a deficient number, since it is larger than the sum of its proper divisors (1).

25126681 is an equidigital number, since it uses as much as digits as its factorization.

25126681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 31.

The square root of 25126681 is about 5012.6520924556. The cubic root of 25126681 is about 292.8948319302.

The spelling of 25126681 in words is "twenty-five million, one hundred twenty-six thousand, six hundred eighty-one".