6391042 has 8 divisors (see below), whose sum is σ = 10956096. Its totient is φ = 2739012.

The previous prime is 6391009. The next prime is 6391043. The reversal of 6391042 is 2401936.

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

It is a junction number, because it is equal to n+sod(n) for n = 6390998 and 6391016.

It is not an unprimeable number, because it can be changed into a prime (6391043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228238 + ... + 228265.

It is an arithmetic number, because the mean of its divisors is an integer number (1369512).

Almost surely, 2^6391042 is an apocalyptic number.

6391042 is a deficient number, since it is larger than the sum of its proper divisors (4565054).

6391042 is a wasteful number, since it uses less digits than its factorization.

6391042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456512.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 6391042 is about 2528.0510279660. The cubic root of 6391042 is about 185.5768892461.

Adding to 6391042 its reverse (2401936), we get a palindrome (8792978).

It can be divided in two parts, 639 and 1042, that added together give a square (1681 = 41²).

The spelling of 6391042 in words is "six million, three hundred ninety-one thousand, forty-two".