25243994 has 4 divisors (see below), whose sum is σ = 37865994. Its totient is φ = 12621996.

The previous prime is 25243993. The next prime is 25244003. The reversal of 25243994 is 49934252.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 21390625 + 3853369 = 4625^2 + 1963^2 .

It is not an unprimeable number, because it can be changed into a prime (25243993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6310997 + ... + 6311000.

Almost surely, 2^25243994 is an apocalyptic number.

25243994 is a deficient number, since it is larger than the sum of its proper divisors (12622000).

25243994 is a wasteful number, since it uses less digits than its factorization.

25243994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12621999.

The product of its digits is 77760, while the sum is 38.

The square root of 25243994 is about 5024.3401556821. The cubic root of 25243994 is about 293.3499528577.

The spelling of 25243994 in words is "twenty-five million, two hundred forty-three thousand, nine hundred ninety-four".