6446247 has 8 divisors (see below), whose sum is σ = 9100656. Its totient is φ = 4044672.

The previous prime is 6446243. The next prime is 6446257. The reversal of 6446247 is 7426446.

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

It is not a de Polignac number, because 6446247 - 2² = 6446243 is a prime.

It is a super-3 number, since 3×6446247³ (a number of 21 digits) contains 333 as substring.

It is a d-powerful number, because it can be written as 6⁶ + 4² + 4⁵ + 6⁸ + 2¹⁹ + 4¹¹ + 7³ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6446243) 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, 63148 + ... + 63249.

It is an arithmetic number, because the mean of its divisors is an integer number (1137582).

Almost surely, 2^6446247 is an apocalyptic number.

6446247 is a deficient number, since it is larger than the sum of its proper divisors (2654409).

6446247 is a wasteful number, since it uses less digits than its factorization.

6446247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126417.

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

The square root of 6446247 is about 2538.9460411754. The cubic root of 6446247 is about 186.1096878747.

The spelling of 6446247 in words is "six million, four hundred forty-six thousand, two hundred forty-seven".