261926 has 16 divisors (see below), whose sum is σ = 458784. Its totient is φ = 109824.

The previous prime is 261917. The next prime is 261959. The reversal of 261926 is 629162.

It is a junction number, because it is equal to n+sod(n) for n = 261895 and 261904.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 566 + ... + 918.

It is an arithmetic number, because the mean of its divisors is an integer number (28674).

2²⁶¹⁹²⁶ is an apocalyptic number.

261926 is a deficient number, since it is larger than the sum of its proper divisors (196858).

261926 is a wasteful number, since it uses less digits than its factorization.

261926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415.

The product of its digits is 1296, while the sum is 26.

The square root of 261926 is about 511.7870650964. The cubic root of 261926 is about 63.9822541945.

Subtracting 261926 from its reverse (629162), we obtain a square (367236 = 606²).

The spelling of 261926 in words is "two hundred sixty-one thousand, nine hundred twenty-six".