25257291 has 8 divisors (see below), whose sum is σ = 35657424. Its totient is φ = 15847680.

The previous prime is 25257277. The next prime is 25257293. The reversal of 25257291 is 19275252.

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 25257291 - 2⁵ = 25257259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25257293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247570 + ... + 247671.

It is an arithmetic number, because the mean of its divisors is an integer number (4457178).

Almost surely, 2^25257291 is an apocalyptic number.

25257291 is a deficient number, since it is larger than the sum of its proper divisors (10400133).

25257291 is a wasteful number, since it uses less digits than its factorization.

25257291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495261.

The product of its digits is 12600, while the sum is 33.

The square root of 25257291 is about 5025.6632398122. The cubic root of 25257291 is about 293.4014501187.

The spelling of 25257291 in words is "twenty-five million, two hundred fifty-seven thousand, two hundred ninety-one".