6421158 has 12 divisors (see below), whose sum is σ = 13912548. Its totient is φ = 2140380.

The previous prime is 6421157. The next prime is 6421159. The reversal of 6421158 is 8511246.

6421158 is a `hidden beast` number, since 642 + 1 + 15 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (6421157) and next prime (6421159).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6421157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 178348 + ... + 178383.

It is an arithmetic number, because the mean of its divisors is an integer number (1159379).

Almost surely, 2^6421158 is an apocalyptic number.

6421158 is an abundant number, since it is smaller than the sum of its proper divisors (7491390).

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

6421158 is a wasteful number, since it uses less digits than its factorization.

6421158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356739 (or 356736 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 6421158 is about 2534.0003946330. Note that the first 3 decimals coincide. The cubic root of 6421158 is about 185.8679256634.

The spelling of 6421158 in words is "six million, four hundred twenty-one thousand, one hundred fifty-eight".