6781842 has 12 divisors (see below), whose sum is σ = 14694030. Its totient is φ = 2260608.

The previous prime is 6781823. The next prime is 6781843. The reversal of 6781842 is 2481876.

It can be written as a sum of positive squares in only one way, i.e., 6765201 + 16641 = 2601^2 + 129^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6781797 and 6781806.

It is not an unprimeable number, because it can be changed into a prime (6781843) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 188367 + ... + 188402.

Almost surely, 2^6781842 is an apocalyptic number.

6781842 is an abundant number, since it is smaller than the sum of its proper divisors (7912188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6781842 is a wasteful number, since it uses less digits than its factorization.

6781842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376777 (or 376774 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 6781842 is about 2604.1969971567. The cubic root of 6781842 is about 189.2848647947.

The spelling of 6781842 in words is "six million, seven hundred eighty-one thousand, eight hundred forty-two".