6402239 has 4 divisors (see below), whose sum is σ = 6483360. Its totient is φ = 6321120.

The previous prime is 6402203. The next prime is 6402247. The reversal of 6402239 is 9322046.

6402239 = T₂₀₂ + T₂₀₃ + ... + T₃₅₉.

6402239 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6402239 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 (6402269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40442 + ... + 40599.

It is an arithmetic number, because the mean of its divisors is an integer number (1620840).

Almost surely, 2^6402239 is an apocalyptic number.

6402239 is a deficient number, since it is larger than the sum of its proper divisors (81121).

6402239 is an equidigital number, since it uses as much as digits as its factorization.

6402239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81120.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 6402239 is about 2530.2646106682. The cubic root of 6402239 is about 185.6852018981.

The spelling of 6402239 in words is "six million, four hundred two thousand, two hundred thirty-nine".