286875261 has 6 divisors (see below), whose sum is σ = 414375390. Its totient is φ = 191250168.

The previous prime is 286875223. The next prime is 286875283. The reversal of 286875261 is 162578682.

It can be written as a sum of positive squares in only one way, i.e., 168740100 + 118135161 = 12990^2 + 10869^2 .

It is not a de Polignac number, because 286875261 - 2⁷ = 286875133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (286875161) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15937506 + ... + 15937523.

It is an arithmetic number, because the mean of its divisors is an integer number (69062565).

Almost surely, 2^286875261 is an apocalyptic number.

It is an amenable number.

286875261 is a deficient number, since it is larger than the sum of its proper divisors (127500129).

286875261 is a wasteful number, since it uses less digits than its factorization.

286875261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31875035 (or 31875032 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 286875261 is about 16937.3923908021. The cubic root of 286875261 is about 659.5246508363.

The spelling of 286875261 in words is "two hundred eighty-six million, eight hundred seventy-five thousand, two hundred sixty-one".