6861642 has 16 divisors (see below), whose sum is σ = 14530752. Its totient is φ = 2152640.

The previous prime is 6861629. The next prime is 6861691. The reversal of 6861642 is 2461686.

It is a happy number.

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 33534 + ... + 33737.

It is an arithmetic number, because the mean of its divisors is an integer number (908172).

Almost surely, 2^6861642 is an apocalyptic number.

6861642 is an abundant number, since it is smaller than the sum of its proper divisors (7669110).

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

6861642 is a wasteful number, since it uses less digits than its factorization.

6861642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67293.

The product of its digits is 13824, while the sum is 33.

The square root of 6861642 is about 2619.4736112433. The cubic root of 6861642 is about 190.0243920670.

It can be divided in two parts, 6861 and 642, that added together give a triangular number (7503 = T₁₂₂).

The spelling of 6861642 in words is "six million, eight hundred sixty-one thousand, six hundred forty-two".