25004681 has 4 divisors (see below), whose sum is σ = 26928132. Its totient is φ = 23081232.

The previous prime is 25004669. The next prime is 25004701. The reversal of 25004681 is 18640052.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8317456 + 16687225 = 2884^2 + 4085^2 .

It is a cyclic number.

It is not a de Polignac number, because 25004681 - 2¹⁴ = 24988297 is a prime.

It is a super-2 number, since 2×25004681² = 1250468143823522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25004681.

It is not an unprimeable number, because it can be changed into a prime (25004621) 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 3 ways as a sum of consecutive naturals, for example, 961706 + ... + 961731.

It is an arithmetic number, because the mean of its divisors is an integer number (6732033).

Almost surely, 2^25004681 is an apocalyptic number.

It is an amenable number.

25004681 is a deficient number, since it is larger than the sum of its proper divisors (1923451).

25004681 is a wasteful number, since it uses less digits than its factorization.

25004681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1923450.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 25004681 is about 5000.4680780903. The cubic root of 25004681 is about 292.4200224518.

The spelling of 25004681 in words is "twenty-five million, four thousand, six hundred eighty-one".