6421436 has 24 divisors (see below), whose sum is σ = 13009920. Its totient is φ = 2716272.

The previous prime is 6421421. The next prime is 6421477. The reversal of 6421436 is 6341246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 761 + ... + 3663.

It is an arithmetic number, because the mean of its divisors is an integer number (542080).

Almost surely, 2^6421436 is an apocalyptic number.

It is an amenable number.

6421436 is an abundant number, since it is smaller than the sum of its proper divisors (6588484).

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

6421436 is a wasteful number, since it uses less digits than its factorization.

6421436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2993 (or 2991 counting only the distinct ones).

The product of its digits is 3456, while the sum is 26.

The square root of 6421436 is about 2534.0552480165. The cubic root of 6421436 is about 185.8706079697.

The spelling of 6421436 in words is "six million, four hundred twenty-one thousand, four hundred thirty-six".