6861220 has 12 divisors (see below), whose sum is σ = 14408604. Its totient is φ = 2744480.

The previous prime is 6861203. The next prime is 6861241. The reversal of 6861220 is 221686.

It can be written as a sum of positive squares in 2 ways, for example, as 2056356 + 4804864 = 1434^2 + 2192^2 .

It is a nialpdrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171511 + ... + 171550.

It is an arithmetic number, because the mean of its divisors is an integer number (1200717).

Almost surely, 2^6861220 is an apocalyptic number.

It is an amenable number.

6861220 is an abundant number, since it is smaller than the sum of its proper divisors (7547384).

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

6861220 is a wasteful number, since it uses less digits than its factorization.

6861220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343070 (or 343068 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 6861220 is about 2619.3930594701. The cubic root of 6861220 is about 190.0204964038.

The spelling of 6861220 in words is "six million, eight hundred sixty-one thousand, two hundred twenty".