507861 has 12 divisors (see below), whose sum is σ = 744588. Its totient is φ = 333504.

The previous prime is 507839. The next prime is 507883. The reversal of 507861 is 168705.

It is an interprime number because it is at equal distance from previous prime (507839) and next prime (507883).

It can be written as a sum of positive squares in 2 ways, for example, as 140625 + 367236 = 375^2 + 606^2 .

It is not a de Polignac number, because 507861 - 2⁶ = 507797 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (507821) 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, 271 + ... + 1043.

It is an arithmetic number, because the mean of its divisors is an integer number (62049).

2⁵⁰⁷⁸⁶¹ is an apocalyptic number.

It is an amenable number.

507861 is a deficient number, since it is larger than the sum of its proper divisors (236727).

507861 is a wasteful number, since it uses less digits than its factorization.

507861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852 (or 849 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 507861 is about 712.6436697256. The cubic root of 507861 is about 79.7838435643.

The spelling of 507861 in words is "five hundred seven thousand, eight hundred sixty-one".