261874 has 8 divisors (see below), whose sum is σ = 396288. Its totient is φ = 129780.

The previous prime is 261847. The next prime is 261881. The reversal of 261874 is 478162.

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

It is a congruent number.

It is an unprimeable number.

261874 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, 262 + ... + 769.

It is an arithmetic number, because the mean of its divisors is an integer number (49536).

2²⁶¹⁸⁷⁴ is an apocalyptic number.

261874 is a deficient number, since it is larger than the sum of its proper divisors (134414).

261874 is a wasteful number, since it uses less digits than its factorization.

261874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160.

The product of its digits is 2688, while the sum is 28.

The square root of 261874 is about 511.7362601966. The cubic root of 261874 is about 63.9780197957.

The spelling of 261874 in words is "two hundred sixty-one thousand, eight hundred seventy-four".