25775247 has 16 divisors (see below), whose sum is σ = 36640512. Its totient is φ = 16060800.

The previous prime is 25775231. The next prime is 25775261. The reversal of 25775247 is 74257752.

It is not a de Polignac number, because 25775247 - 2⁴ = 25775231 is a prime.

It is a super-2 number, since 2×25775247² = 1328726715822018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25775207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6028 + ... + 9374.

It is an arithmetic number, because the mean of its divisors is an integer number (2290032).

Almost surely, 2^25775247 is an apocalyptic number.

25775247 is a deficient number, since it is larger than the sum of its proper divisors (10865265).

25775247 is a wasteful number, since it uses less digits than its factorization.

25775247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3518.

The product of its digits is 137200, while the sum is 39.

The square root of 25775247 is about 5076.9328339067. The cubic root of 25775247 is about 295.3935072245.

The spelling of 25775247 in words is "twenty-five million, seven hundred seventy-five thousand, two hundred forty-seven".