261325069 has 4 divisors (see below), whose sum is σ = 275079040. Its totient is φ = 247571100.

The previous prime is 261325049. The next prime is 261325073. The reversal of 261325069 is 960523162.

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, and also an emirpimes, since its reverse is a distinct semiprime: 960523162 = 2 ⋅480261581.

It is a cyclic number.

It is not a de Polignac number, because 261325069 - 2⁷ = 261324941 is a prime.

It is a super-2 number, since 2×261325069² = 136581583375709522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261325049) 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, 6876957 + ... + 6876994.

It is an arithmetic number, because the mean of its divisors is an integer number (68769760).

Almost surely, 2^261325069 is an apocalyptic number.

It is an amenable number.

261325069 is a deficient number, since it is larger than the sum of its proper divisors (13753971).

261325069 is a wasteful number, since it uses less digits than its factorization.

261325069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13753970.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 261325069 is about 16165.5519237668. The cubic root of 261325069 is about 639.3328570507.

The spelling of 261325069 in words is "two hundred sixty-one million, three hundred twenty-five thousand, sixty-nine".