25266321 has 6 divisors (see below), whose sum is σ = 36495810. Its totient is φ = 16844208.

The previous prime is 25266313. The next prime is 25266331. The reversal of 25266321 is 12366252.

25266321 is a `hidden beast` number, since 2 + 5 + 26 + 632 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17313921 + 7952400 = 4161^2 + 2820^2 .

It is not a de Polignac number, because 25266321 - 2³ = 25266313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25266331) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1403676 + ... + 1403693.

It is an arithmetic number, because the mean of its divisors is an integer number (6082635).

Almost surely, 2^25266321 is an apocalyptic number.

It is an amenable number.

25266321 is a deficient number, since it is larger than the sum of its proper divisors (11229489).

25266321 is a wasteful number, since it uses less digits than its factorization.

25266321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2807375 (or 2807372 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 25266321 is about 5026.5615484146. The cubic root of 25266321 is about 293.4364116330.

The spelling of 25266321 in words is "twenty-five million, two hundred sixty-six thousand, three hundred twenty-one".