286234021 has 4 divisors (see below), whose sum is σ = 290926444. Its totient is φ = 281541600.

The previous prime is 286233979. The next prime is 286234033. The reversal of 286234021 is 120432682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120432682 = 2 ⋅60216341.

It can be written as a sum of positive squares in 2 ways, for example, as 60062500 + 226171521 = 7750^2 + 15039^2 .

It is a cyclic number.

It is not a de Polignac number, because 286234021 - 2²³ = 277845413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (286534021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2346120 + ... + 2346241.

It is an arithmetic number, because the mean of its divisors is an integer number (72731611).

Almost surely, 2^286234021 is an apocalyptic number.

It is an amenable number.

286234021 is a deficient number, since it is larger than the sum of its proper divisors (4692423).

286234021 is an equidigital number, since it uses as much as digits as its factorization.

286234021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4692422.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 286234021 is about 16918.4520864055. The cubic root of 286234021 is about 659.0328818303.

The spelling of 286234021 in words is "two hundred eighty-six million, two hundred thirty-four thousand, twenty-one".