207861 has 8 divisors (see below), whose sum is σ = 279360. Its totient is φ = 137472.

The previous prime is 207847. The next prime is 207869. The reversal of 207861 is 168702.

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

It is not a de Polignac number, because 207861 - 2⁶ = 207797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (207869) 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, 400 + ... + 758.

It is an arithmetic number, because the mean of its divisors is an integer number (34920).

2²⁰⁷⁸⁶¹ is an apocalyptic number.

It is an amenable number.

207861 is a deficient number, since it is larger than the sum of its proper divisors (71499).

207861 is a wasteful number, since it uses less digits than its factorization.

207861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 207861 is about 455.9177557411. The cubic root of 207861 is about 59.2367201273.

The spelling of 207861 in words is "two hundred seven thousand, eight hundred sixty-one".