25712681 has 8 divisors (see below), whose sum is σ = 27336000. Its totient is φ = 24116400.

The previous prime is 25712677. The next prime is 25712693. The reversal of 25712681 is 18621752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25712681 - 2² = 25712677 is a prime.

It is a super-2 number, since 2×25712681² = 1322283928415522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25712881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4781 + ... + 8618.

It is an arithmetic number, because the mean of its divisors is an integer number (3417000).

Almost surely, 2^25712681 is an apocalyptic number.

It is an amenable number.

25712681 is a deficient number, since it is larger than the sum of its proper divisors (1623319).

25712681 is a wasteful number, since it uses less digits than its factorization.

25712681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13519.

The product of its digits is 6720, while the sum is 32.

The square root of 25712681 is about 5070.7672989401. The cubic root of 25712681 is about 295.1543040303.

The spelling of 25712681 in words is "twenty-five million, seven hundred twelve thousand, six hundred eighty-one".