25782251 has 8 divisors (see below), whose sum is σ = 29780784. Its totient is φ = 22059520.

The previous prime is 25782227. The next prime is 25782257. The reversal of 25782251 is 15228752.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 25782251 - 2¹⁰ = 25781227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25782257) 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, 68750 + ... + 69123.

It is an arithmetic number, because the mean of its divisors is an integer number (3722598).

Almost surely, 2^25782251 is an apocalyptic number.

25782251 is a deficient number, since it is larger than the sum of its proper divisors (3998533).

25782251 is a wasteful number, since it uses less digits than its factorization.

25782251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137901.

The product of its digits is 11200, while the sum is 32.

The square root of 25782251 is about 5077.6225736067. The cubic root of 25782251 is about 295.4202609126.

The spelling of 25782251 in words is "twenty-five million, seven hundred eighty-two thousand, two hundred fifty-one".