6390245 has 8 divisors (see below), whose sum is σ = 7703160. Its totient is φ = 5088960.

The previous prime is 6390239. The next prime is 6390257. The reversal of 6390245 is 5420936.

It can be written as a sum of positive squares in 4 ways, for example, as 1399489 + 4990756 = 1183^2 + 2234^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6390245 - 2⁸ = 6389989 is a prime.

It is a d-powerful number, because it can be written as 6⁵ + 3¹³ + 9⁷ + 0 + 2¹¹ + 4 + 5⁵ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1646 + ... + 3935.

It is an arithmetic number, because the mean of its divisors is an integer number (962895).

Almost surely, 2^6390245 is an apocalyptic number.

It is an amenable number.

6390245 is a deficient number, since it is larger than the sum of its proper divisors (1312915).

6390245 is a wasteful number, since it uses less digits than its factorization.

6390245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5815.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 6390245 is about 2527.8933917395. The cubic root of 6390245 is about 185.5691747540.

The spelling of 6390245 in words is "six million, three hundred ninety thousand, two hundred forty-five".