6402842 has 4 divisors (see below), whose sum is σ = 9604266. Its totient is φ = 3201420.

The previous prime is 6402841. The next prime is 6402859. The reversal of 6402842 is 2482046.

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

It can be written as a sum of positive squares in only one way, i.e., 3308761 + 3094081 = 1819^2 + 1759^2 .

It is not an unprimeable number, because it can be changed into a prime (6402841) by changing a digit.

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 as a sum of consecutive naturals, namely, 1600709 + ... + 1600712.

Almost surely, 2^6402842 is an apocalyptic number.

6402842 is a deficient number, since it is larger than the sum of its proper divisors (3201424).

6402842 is a wasteful number, since it uses less digits than its factorization.

6402842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3201423.

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 6402842 is about 2530.3837653605. The cubic root of 6402842 is about 185.6910313515.

Adding to 6402842 its reverse (2482046), we get a palindrome (8884888).

The spelling of 6402842 in words is "six million, four hundred two thousand, eight hundred forty-two".