6421086 has 32 divisors (see below), whose sum is σ = 16308480. Its totient is φ = 1834488.

The previous prime is 6421073. The next prime is 6421099. The reversal of 6421086 is 6801246.

6421086 is a `hidden beast` number, since 642 + 10 + 8 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (6421073) and next prime (6421099).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8116 + ... + 8871.

It is an arithmetic number, because the mean of its divisors is an integer number (509640).

Almost surely, 2^6421086 is an apocalyptic number.

6421086 is an abundant number, since it is smaller than the sum of its proper divisors (9887394).

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

6421086 is a wasteful number, since it uses less digits than its factorization.

6421086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17005 (or 16999 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 6421086 is about 2533.9861878077. The cubic root of 6421086 is about 185.8672309528.

It can be divided in two parts, 642 and 1086, that added together give a cube (1728 = 12³).

The spelling of 6421086 in words is "six million, four hundred twenty-one thousand, eighty-six".