286390121 has 4 divisors (see below), whose sum is σ = 295628544. Its totient is φ = 277151700.

The previous prime is 286390099. The next prime is 286390127. The reversal of 286390121 is 121093682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121093682 = 2 ⋅60546841.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-286390121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (286390127) 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, 4619165 + ... + 4619226.

It is an arithmetic number, because the mean of its divisors is an integer number (73907136).

Almost surely, 2^286390121 is an apocalyptic number.

It is an amenable number.

286390121 is a deficient number, since it is larger than the sum of its proper divisors (9238423).

286390121 is an equidigital number, since it uses as much as digits as its factorization.

286390121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9238422.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 286390121 is about 16923.0647638068. The cubic root of 286390121 is about 659.1526629997.

The spelling of 286390121 in words is "two hundred eighty-six million, three hundred ninety thousand, one hundred twenty-one".