390251 has 4 divisors (see below), whose sum is σ = 391632. Its totient is φ = 388872.

The previous prime is 390223. The next prime is 390263. The reversal of 390251 is 152093.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 390251 - 2¹⁰ = 389227 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 390251.

It is not an unprimeable number, because it can be changed into a prime (390211) 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, 95 + ... + 888.

It is an arithmetic number, because the mean of its divisors is an integer number (97908).

2³⁹⁰²⁵¹ is an apocalyptic number.

390251 is a deficient number, since it is larger than the sum of its proper divisors (1381).

390251 is an equidigital number, since it uses as much as digits as its factorization.

390251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 390251 is about 624.7007283492. The cubic root of 390251 is about 73.0771062429.

The spelling of 390251 in words is "three hundred ninety thousand, two hundred fifty-one".