6447242 has 4 divisors (see below), whose sum is σ = 9670866. Its totient is φ = 3223620.

The previous prime is 6447239. The next prime is 6447253. The reversal of 6447242 is 2427446.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 4456321 + 1990921 = 2111^2 + 1411^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1611809 + ... + 1611812.

Almost surely, 2^6447242 is an apocalyptic number.

6447242 is a deficient number, since it is larger than the sum of its proper divisors (3223624).

6447242 is a wasteful number, since it uses less digits than its factorization.

6447242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3223623.

The product of its digits is 10752, while the sum is 29.

The square root of 6447242 is about 2539.1419810637. The cubic root of 6447242 is about 186.1192629351.

The spelling of 6447242 in words is "six million, four hundred forty-seven thousand, two hundred forty-two".