261946 has 4 divisors (see below), whose sum is σ = 392922. Its totient is φ = 130972.

The previous prime is 261917. The next prime is 261959. The reversal of 261946 is 649162.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 168921 + 93025 = 411^2 + 305^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65485 + ... + 65488.

261946 is a Friedman number, since it can be written as 4^9-66*(2+1), using all its digits and the basic arithmetic operations.

2²⁶¹⁹⁴⁶ is an apocalyptic number.

261946 is a deficient number, since it is larger than the sum of its proper divisors (130976).

261946 is a wasteful number, since it uses less digits than its factorization.

261946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130975.

The product of its digits is 2592, while the sum is 28.

The square root of 261946 is about 511.8066040996. The cubic root of 261946 is about 63.9838826602.

The spelling of 261946 in words is "two hundred sixty-one thousand, nine hundred forty-six".