6421876 has 36 divisors (see below), whose sum is σ = 12291552. Its totient is φ = 2929696.

The previous prime is 6421873. The next prime is 6421901. The reversal of 6421876 is 6781246.

6421876 = T₁₉₁ + T₁₉₂ + ... + T₃₅₆.

Its product of digits (16128) is a multiple of the sum of its prime factors (168).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6421873) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77331 + ... + 77413.

It is an arithmetic number, because the mean of its divisors is an integer number (341432).

Almost surely, 2^6421876 is an apocalyptic number.

It is an amenable number.

6421876 is a deficient number, since it is larger than the sum of its proper divisors (5869676).

6421876 is a wasteful number, since it uses less digits than its factorization.

6421876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 137 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 6421876 is about 2534.1420638946. The cubic root of 6421876 is about 185.8748531884.

The spelling of 6421876 in words is "six million, four hundred twenty-one thousand, eight hundred seventy-six".