390245 has 4 divisors (see below), whose sum is σ = 468300. Its totient is φ = 312192.

The previous prime is 390223. The next prime is 390263. The reversal of 390245 is 542093.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 113569 + 276676 = 337^2 + 526^2 .

It is a cyclic number.

It is not a de Polignac number, because 390245 - 2⁸ = 389989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 390245.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39020 + ... + 39029.

It is an arithmetic number, because the mean of its divisors is an integer number (117075).

2³⁹⁰²⁴⁵ is an apocalyptic number.

It is an amenable number.

390245 is a deficient number, since it is larger than the sum of its proper divisors (78055).

390245 is an equidigital number, since it uses as much as digits as its factorization.

390245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78054.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 390245 is about 624.6959260312. The cubic root of 390245 is about 73.0767317276.

The spelling of 390245 in words is "three hundred ninety thousand, two hundred forty-five".