6447081 has 8 divisors (see below), whose sum is σ = 8654400. Its totient is φ = 4268912.

The previous prime is 6447073. The next prime is 6447109. The reversal of 6447081 is 1807446.

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

It is a cyclic number.

It is not a de Polignac number, because 6447081 - 2³ = 6447073 is a prime.

It is a super-2 number, since 2×6447081² = 83129706841122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6447031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6765 + ... + 7658.

It is an arithmetic number, because the mean of its divisors is an integer number (1081800).

Almost surely, 2^6447081 is an apocalyptic number.

It is an amenable number.

6447081 is a deficient number, since it is larger than the sum of its proper divisors (2207319).

6447081 is a wasteful number, since it uses less digits than its factorization.

6447081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14575.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 6447081 is about 2539.1102772428. The cubic root of 6447081 is about 186.1177136705.

The spelling of 6447081 in words is "six million, four hundred forty-seven thousand, eighty-one".