261195725 has 36 divisors (see below), whose sum is σ = 381672000. Its totient is φ = 176772960.

The previous prime is 261195709. The next prime is 261195733. The reversal of 261195725 is 527591162.

It is a happy number.

It is not a de Polignac number, because 261195725 - 2⁴ = 261195709 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 95426 + ... + 98124.

It is an arithmetic number, because the mean of its divisors is an integer number (10602000).

Almost surely, 2^261195725 is an apocalyptic number.

261195725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

261195725 is a deficient number, since it is larger than the sum of its proper divisors (120476275).

261195725 is a wasteful number, since it uses less digits than its factorization.

261195725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2802 (or 2790 counting only the distinct ones).

The product of its digits is 37800, while the sum is 38.

The square root of 261195725 is about 16161.5508228635. The cubic root of 261195725 is about 639.2273594338.

The spelling of 261195725 in words is "two hundred sixty-one million, one hundred ninety-five thousand, seven hundred twenty-five".