261266325 has 24 divisors (see below), whose sum is σ = 434177568. Its totient is φ = 138626880.

The previous prime is 261266311. The next prime is 261266339. The reversal of 261266325 is 523662162.

It is an interprime number because it is at equal distance from previous prime (261266311) and next prime (261266339).

It is not a de Polignac number, because 261266325 - 2⁵ = 261266293 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5934 + ... + 23616.

It is an arithmetic number, because the mean of its divisors is an integer number (18090732).

Almost surely, 2^261266325 is an apocalyptic number.

261266325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

261266325 is a deficient number, since it is larger than the sum of its proper divisors (172911243).

261266325 is a wasteful number, since it uses less digits than its factorization.

261266325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17893 (or 17888 counting only the distinct ones).

The product of its digits is 25920, while the sum is 33.

The square root of 261266325 is about 16163.7348716192. The cubic root of 261266325 is about 639.2849476480.

The spelling of 261266325 in words is "two hundred sixty-one million, two hundred sixty-six thousand, three hundred twenty-five".