261382125 has 16 divisors (see below), whose sum is σ = 434940480. Its totient is φ = 139403600.

The previous prime is 261382103. The next prime is 261382139. The reversal of 261382125 is 521283162.

It is not a de Polignac number, because 261382125 - 2⁷ = 261381997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 261382092 and 261382101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348135 + ... + 348884.

It is an arithmetic number, because the mean of its divisors is an integer number (27183780).

Almost surely, 2^261382125 is an apocalyptic number.

261382125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

261382125 is a deficient number, since it is larger than the sum of its proper divisors (173558355).

261382125 is an equidigital number, since it uses as much as digits as its factorization.

261382125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697037 (or 697027 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 261382125 is about 16167.3165676930. The cubic root of 261382125 is about 639.3793829111.

The spelling of 261382125 in words is "two hundred sixty-one million, three hundred eighty-two thousand, one hundred twenty-five".