861207 has 8 divisors (see below), whose sum is σ = 1153776. Its totient is φ = 571392.

The previous prime is 861199. The next prime is 861221. The reversal of 861207 is 702168.

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

It is not a de Polignac number, because 861207 - 2³ = 861199 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 861207.

It is not an unprimeable number, because it can be changed into a prime (861907) 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, 213 + ... + 1329.

It is an arithmetic number, because the mean of its divisors is an integer number (144222).

2⁸⁶¹²⁰⁷ is an apocalyptic number.

861207 is a deficient number, since it is larger than the sum of its proper divisors (292569).

861207 is a wasteful number, since it uses less digits than its factorization.

861207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377.

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

The square root of 861207 is about 928.0123921586. The cubic root of 861207 is about 95.1413224431.

The spelling of 861207 in words is "eight hundred sixty-one thousand, two hundred seven".