6491406 has 8 divisors (see below), whose sum is σ = 12982824. Its totient is φ = 2163800.

The previous prime is 6491377. The next prime is 6491411. The reversal of 6491406 is 6041946.

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

6491406 is an admirable 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, 540945 + ... + 540956.

It is an arithmetic number, because the mean of its divisors is an integer number (1622853).

Almost surely, 2^6491406 is an apocalyptic number.

6491406 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.

6491406 is a wasteful number, since it uses less digits than its factorization.

6491406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081906.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 6491406 is about 2547.8237772656. The cubic root of 6491406 is about 186.5432723325.

The spelling of 6491406 in words is "six million, four hundred ninety-one thousand, four hundred six".