267861 has 8 divisors (see below), whose sum is σ = 389664. Its totient is φ = 162320.

The previous prime is 267857. The next prime is 267863. The reversal of 267861 is 168762.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 267861 - 2² = 267857 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (267863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4026 + ... + 4091.

It is an arithmetic number, because the mean of its divisors is an integer number (48708).

2²⁶⁷⁸⁶¹ is an apocalyptic number.

It is an amenable number.

267861 is a deficient number, since it is larger than the sum of its proper divisors (121803).

267861 is a wasteful number, since it uses less digits than its factorization.

267861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8131.

The product of its digits is 4032, while the sum is 30.

The square root of 267861 is about 517.5528958474. The cubic root of 267861 is about 64.4619088837.

Subtracting from 267861 its reverse (168762), we obtain a palindrome (99099).

It can be divided in two parts, 267 and 861, that added together give a triangular number (1128 = T₄₇).

The spelling of 267861 in words is "two hundred sixty-seven thousand, eight hundred sixty-one".