261922 has 8 divisors (see below), whose sum is σ = 395676. Its totient is φ = 130032.

The previous prime is 261917. The next prime is 261959. The reversal of 261922 is 229162.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 239121 + 22801 = 489^2 + 151^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 261893 and 261902.

It is an unprimeable number.

261922 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33 + ... + 724.

261922 is a Friedman number, since it can be written as (9-1)^6-222, using all its digits and the basic arithmetic operations.

2²⁶¹⁹²² is an apocalyptic number.

261922 is a deficient number, since it is larger than the sum of its proper divisors (133754).

261922 is a wasteful number, since it uses less digits than its factorization.

261922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932.

The product of its digits is 432, while the sum is 22.

The square root of 261922 is about 511.7831572063. The cubic root of 261922 is about 63.9819284914.

The spelling of 261922 in words is "two hundred sixty-one thousand, nine hundred twenty-two".