25551265 has 8 divisors (see below), whose sum is σ = 30868200. Its totient is φ = 20303232.

The previous prime is 25551263. The next prime is 25551269. The reversal of 25551265 is 56215552.

It can be written as a sum of positive squares in 4 ways, for example, as 3564544 + 21986721 = 1888^2 + 4689^2 .

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 25551265 - 2¹ = 25551263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25551263) 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, 16404 + ... + 17893.

It is an arithmetic number, because the mean of its divisors is an integer number (3858525).

Almost surely, 2^25551265 is an apocalyptic number.

It is an amenable number.

25551265 is a deficient number, since it is larger than the sum of its proper divisors (5316935).

25551265 is a wasteful number, since it uses less digits than its factorization.

25551265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34451.

The product of its digits is 15000, while the sum is 31.

The square root of 25551265 is about 5054.8259119380. The cubic root of 25551265 is about 294.5353789253.

The spelling of 25551265 in words is "twenty-five million, five hundred fifty-one thousand, two hundred sixty-five".