25228261 has 4 divisors (see below), whose sum is σ = 25329024. Its totient is φ = 25127500.

The previous prime is 25228253. The next prime is 25228277. The reversal of 25228261 is 16282252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25228261 - 2³ = 25228253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25228211) 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, 50005 + ... + 50506.

It is an arithmetic number, because the mean of its divisors is an integer number (6332256).

Almost surely, 2^25228261 is an apocalyptic number.

It is an amenable number.

25228261 is a deficient number, since it is larger than the sum of its proper divisors (100763).

25228261 is a wasteful number, since it uses less digits than its factorization.

25228261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100762.

The product of its digits is 3840, while the sum is 28.

The square root of 25228261 is about 5022.7742334292. The cubic root of 25228261 is about 293.2889979768.

The spelling of 25228261 in words is "twenty-five million, two hundred twenty-eight thousand, two hundred sixty-one".