207945 has 12 divisors (see below), whose sum is σ = 360516. Its totient is φ = 110880.

The previous prime is 207941. The next prime is 207947. The reversal of 207945 is 549702.

It can be written as a sum of positive squares in 2 ways, for example, as 76176 + 131769 = 276^2 + 363^2 .

It is not a de Polignac number, because 207945 - 2² = 207941 is a prime.

It is a super-2 number, since 2×207945² = 86482246050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (207941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2266 + ... + 2355.

It is an arithmetic number, because the mean of its divisors is an integer number (30043).

2²⁰⁷⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

207945 is a deficient number, since it is larger than the sum of its proper divisors (152571).

207945 is a wasteful number, since it uses less digits than its factorization.

207945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4632 (or 4629 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 207945 is about 456.0098683143. The cubic root of 207945 is about 59.2446985589.

The spelling of 207945 in words is "two hundred seven thousand, nine hundred forty-five".