25255649 has 4 divisors (see below), whose sum is σ = 25425300. Its totient is φ = 25086000.

The previous prime is 25255609. The next prime is 25255651. The reversal of 25255649 is 94655252.

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 12475024 + 12780625 = 3532^2 + 3575^2 .

It is a cyclic number.

It is not a de Polignac number, because 25255649 - 2⁸ = 25255393 is a prime.

It is a super-2 number, since 2×25255649² = 1275695612822402, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25255609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84602 + ... + 84899.

It is an arithmetic number, because the mean of its divisors is an integer number (6356325).

Almost surely, 2^25255649 is an apocalyptic number.

It is an amenable number.

25255649 is a deficient number, since it is larger than the sum of its proper divisors (169651).

25255649 is a wasteful number, since it uses less digits than its factorization.

25255649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169650.

The product of its digits is 108000, while the sum is 38.

The square root of 25255649 is about 5025.4998756343. The cubic root of 25255649 is about 293.3950918805.

The spelling of 25255649 in words is "twenty-five million, two hundred fifty-five thousand, six hundred forty-nine".