6447642 has 8 divisors (see below), whose sum is σ = 12895296. Its totient is φ = 2149212.

The previous prime is 6447629. The next prime is 6447643. The reversal of 6447642 is 2467446.

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

6447642 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (6447643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537298 + ... + 537309.

It is an arithmetic number, because the mean of its divisors is an integer number (1611912).

Almost surely, 2^6447642 is an apocalyptic number.

6447642 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.

6447642 is a wasteful number, since it uses less digits than its factorization.

6447642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074612.

The product of its digits is 32256, while the sum is 33.

The square root of 6447642 is about 2539.2207466071. The cubic root of 6447642 is about 186.1231119280.

The spelling of 6447642 in words is "six million, four hundred forty-seven thousand, six hundred forty-two".