25295257 has 8 divisors (see below), whose sum is σ = 27755784. Its totient is φ = 22908288.

The previous prime is 25295233. The next prime is 25295273. The reversal of 25295257 is 75259252.

It can be written as a sum of positive squares in 4 ways, for example, as 6031936 + 19263321 = 2456^2 + 4389^2 .

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

It is not a de Polignac number, because 25295257 - 2¹¹ = 25293209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25295227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17668 + ... + 19045.

It is an arithmetic number, because the mean of its divisors is an integer number (3469473).

Almost surely, 2^25295257 is an apocalyptic number.

It is an amenable number.

25295257 is a deficient number, since it is larger than the sum of its proper divisors (2460527).

25295257 is a wasteful number, since it uses less digits than its factorization.

25295257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36779.

The product of its digits is 63000, while the sum is 37.

The square root of 25295257 is about 5029.4390343258. The cubic root of 25295257 is about 293.5483872639.

It can be divided in two parts, 252952 and 57, that added together give a square (253009 = 503²).

The spelling of 25295257 in words is "twenty-five million, two hundred ninety-five thousand, two hundred fifty-seven".