261194 has 8 divisors (see below), whose sum is σ = 397380. Its totient is φ = 128736.

The previous prime is 261169. The next prime is 261223. The reversal of 261194 is 491162.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 237169 + 24025 = 487^2 + 155^2 .

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, 749 + ... + 1040.

2²⁶¹¹⁹⁴ is an apocalyptic number.

261194 is a deficient number, since it is larger than the sum of its proper divisors (136186).

261194 is a wasteful number, since it uses less digits than its factorization.

261194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1864.

The product of its digits is 432, while the sum is 23.

The square root of 261194 is about 511.0714235799. The cubic root of 261194 is about 63.9225952226.

The spelling of 261194 in words is "two hundred sixty-one thousand, one hundred ninety-four".