25087994 has 4 divisors (see below), whose sum is σ = 37631994. Its totient is φ = 12543996.

The previous prime is 25087991. The next prime is 25088017. The reversal of 25087994 is 49978052.

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., 24373969 + 714025 = 4937^2 + 845^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25087991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6271997 + ... + 6272000.

Almost surely, 2^25087994 is an apocalyptic number.

25087994 is a deficient number, since it is larger than the sum of its proper divisors (12544000).

25087994 is a wasteful number, since it uses less digits than its factorization.

25087994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12543999.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 25087994 is about 5008.7916706527. The cubic root of 25087994 is about 292.7444334644.

The spelling of 25087994 in words is "twenty-five million, eighty-seven thousand, nine hundred ninety-four".