506945 has 8 divisors (see below), whose sum is σ = 620136. Its totient is φ = 397696.

The previous prime is 506941. The next prime is 506963. The reversal of 506945 is 549605.

It is a Cunningham number, because it is equal to 712²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 183184 + 323761 = 428^2 + 569^2 .

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 506945 - 2² = 506941 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (506941) 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, 692 + ... + 1221.

It is an arithmetic number, because the mean of its divisors is an integer number (77517).

2⁵⁰⁶⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

506945 is a deficient number, since it is larger than the sum of its proper divisors (113191).

506945 is a wasteful number, since it uses less digits than its factorization.

506945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1971.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 506945 is about 712.0007022468. Note that the first 3 decimals coincide. The cubic root of 506945 is about 79.7358475032.

The spelling of 506945 in words is "five hundred six thousand, nine hundred forty-five".