25279287 has 8 divisors (see below), whose sum is σ = 36769920. Its totient is φ = 15320760.

The previous prime is 25279283. The next prime is 25279351. The reversal of 25279287 is 78297252.

It is a happy number.

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

It is not a de Polignac number, because 25279287 - 2² = 25279283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25279283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 382987 + ... + 383052.

It is an arithmetic number, because the mean of its divisors is an integer number (4596240).

Almost surely, 2^25279287 is an apocalyptic number.

25279287 is a deficient number, since it is larger than the sum of its proper divisors (11490633).

25279287 is a wasteful number, since it uses less digits than its factorization.

25279287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766053.

The product of its digits is 141120, while the sum is 42.

The square root of 25279287 is about 5027.8511314477. The cubic root of 25279287 is about 293.4865976214.

The spelling of 25279287 in words is "twenty-five million, two hundred seventy-nine thousand, two hundred eighty-seven".