6421494 has 8 divisors (see below), whose sum is σ = 12843000. Its totient is φ = 2140496.

The previous prime is 6421477. The next prime is 6421507. The reversal of 6421494 is 4941246.

It is a sphenic number, since it is the product of 3 distinct primes.

6421494 is an admirable number.

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 3 ways as a sum of consecutive naturals, for example, 535119 + ... + 535130.

It is an arithmetic number, because the mean of its divisors is an integer number (1605375).

Almost surely, 2^6421494 is an apocalyptic number.

6421494 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

6421494 is a wasteful number, since it uses less digits than its factorization.

6421494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070254.

The product of its digits is 6912, while the sum is 30.

The square root of 6421494 is about 2534.0666920979. The cubic root of 6421494 is about 185.8711675778.

The spelling of 6421494 in words is "six million, four hundred twenty-one thousand, four hundred ninety-four".