261146 has 8 divisors (see below), whose sum is σ = 402420. Its totient is φ = 127008.

The previous prime is 261127. The next prime is 261167. The reversal of 261146 is 641162.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 261121 + 25 = 511^2 + 5^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1691 + ... + 1838.

2²⁶¹¹⁴⁶ is an apocalyptic number.

261146 is a deficient number, since it is larger than the sum of its proper divisors (141274).

261146 is a wasteful number, since it uses less digits than its factorization.

261146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3568.

The product of its digits is 288, while the sum is 20.

The square root of 261146 is about 511.0244612541. The cubic root of 261146 is about 63.9186792668.

The spelling of 261146 in words is "two hundred sixty-one thousand, one hundred forty-six".