25245681 has 8 divisors (see below), whose sum is σ = 33762144. Its totient is φ = 16779840.

The previous prime is 25245673. The next prime is 25245713. The reversal of 25245681 is 18654252.

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

It is not a de Polignac number, because 25245681 - 2³ = 25245673 is a prime.

It is a super-2 number, since 2×25245681² = 1274688818307522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25245611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11475 + ... + 13496.

It is an arithmetic number, because the mean of its divisors is an integer number (4220268).

Almost surely, 2^25245681 is an apocalyptic number.

It is an amenable number.

25245681 is a deficient number, since it is larger than the sum of its proper divisors (8516463).

25245681 is a wasteful number, since it uses less digits than its factorization.

25245681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25311.

The product of its digits is 19200, while the sum is 33.

The square root of 25245681 is about 5024.5080356190. The cubic root of 25245681 is about 293.3564873539.

The spelling of 25245681 in words is "twenty-five million, two hundred forty-five thousand, six hundred eighty-one".