25981294 has 4 divisors (see below), whose sum is σ = 38971944. Its totient is φ = 12990646.

The previous prime is 25981217. The next prime is 25981297. The reversal of 25981294 is 49218952.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25981297) 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 as a sum of consecutive naturals, namely, 6495322 + ... + 6495325.

It is an arithmetic number, because the mean of its divisors is an integer number (9742986).

Almost surely, 2^25981294 is an apocalyptic number.

25981294 is a deficient number, since it is larger than the sum of its proper divisors (12990650).

25981294 is a wasteful number, since it uses less digits than its factorization.

25981294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12990649.

The product of its digits is 51840, while the sum is 40.

The square root of 25981294 is about 5097.1849093397. The cubic root of 25981294 is about 296.1785430628.

The spelling of 25981294 in words is "twenty-five million, nine hundred eighty-one thousand, two hundred ninety-four".