25266261 has 16 divisors (see below), whose sum is σ = 34604928. Its totient is φ = 16392000.

The previous prime is 25266247. The next prime is 25266277. The reversal of 25266261 is 16266252.

It is not a de Polignac number, because 25266261 - 2⁹ = 25265749 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25266211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17800 + ... + 19166.

It is an arithmetic number, because the mean of its divisors is an integer number (2162808).

Almost surely, 2^25266261 is an apocalyptic number.

It is an amenable number.

25266261 is a deficient number, since it is larger than the sum of its proper divisors (9338667).

25266261 is a wasteful number, since it uses less digits than its factorization.

25266261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1532.

The product of its digits is 8640, while the sum is 30.

The square root of 25266261 is about 5026.5555801165. Note that the first 4 decimals coincide. The cubic root of 25266261 is about 293.4361793581.

Subtracting from 25266261 its reverse (16266252), we obtain a palindrome (9000009).

The spelling of 25266261 in words is "twenty-five million, two hundred sixty-six thousand, two hundred sixty-one".