25056281 has 4 divisors (see below), whose sum is σ = 25278132. Its totient is φ = 24834432.

The previous prime is 25056271. The next prime is 25056313. The reversal of 25056281 is 18265052.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9096256 + 15960025 = 3016^2 + 3995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25056281 is a prime.

It is a super-2 number, since 2×25056281² = 1255634435101922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25056271) 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 3 ways as a sum of consecutive naturals, for example, 110756 + ... + 110981.

It is an arithmetic number, because the mean of its divisors is an integer number (6319533).

Almost surely, 2^25056281 is an apocalyptic number.

It is an amenable number.

25056281 is a deficient number, since it is larger than the sum of its proper divisors (221851).

25056281 is a wasteful number, since it uses less digits than its factorization.

25056281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221850.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 25056281 is about 5005.6249360095. The cubic root of 25056281 is about 292.6210315593.

The spelling of 25056281 in words is "twenty-five million, fifty-six thousand, two hundred eighty-one".