6991042 has 8 divisors (see below), whose sum is σ = 10583100. Its totient is φ = 3463344.

The previous prime is 6991013. The next prime is 6991043. The reversal of 6991042 is 2401996.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6456681 + 534361 = 2541^2 + 731^2 .

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 = 6990995 and 6991013.

It is not an unprimeable number, because it can be changed into a prime (6991043) 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 in 3 ways as a sum of consecutive naturals, for example, 15817 + ... + 16252.

Almost surely, 2^6991042 is an apocalyptic number.

6991042 is a deficient number, since it is larger than the sum of its proper divisors (3592058).

6991042 is a wasteful number, since it uses less digits than its factorization.

6991042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32180.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 6991042 is about 2644.0578662352. The cubic root of 6991042 is about 191.2114832654.

The spelling of 6991042 in words is "six million, nine hundred ninety-one thousand, forty-two".