261894 has 8 divisors (see below), whose sum is σ = 523800. Its totient is φ = 87296.

The previous prime is 261887. The next prime is 261917. The reversal of 261894 is 498162.

261894 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

261894 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21819 + ... + 21830.

It is an arithmetic number, because the mean of its divisors is an integer number (65475).

261894 is a Friedman number, since it can be written as 6+4^9-(2*1)^8, using all its digits and the basic arithmetic operations.

2²⁶¹⁸⁹⁴ is an apocalyptic number.

261894 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261894 is a wasteful number, since it uses less digits than its factorization.

261894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43654.

The product of its digits is 3456, while the sum is 30.

The square root of 261894 is about 511.7558011396. The cubic root of 261894 is about 63.9796484770.

The spelling of 261894 in words is "two hundred sixty-one thousand, eight hundred ninety-four".