6442775 has 6 divisors (see below), whose sum is σ = 7989072. Its totient is φ = 5154200.

The previous prime is 6442771. The next prime is 6442801. The reversal of 6442775 is 5772446.

6442775 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6442775 - 2² = 6442771 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6442771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 128831 + ... + 128880.

It is an arithmetic number, because the mean of its divisors is an integer number (1331512).

Almost surely, 2^6442775 is an apocalyptic number.

6442775 is a deficient number, since it is larger than the sum of its proper divisors (1546297).

6442775 is a wasteful number, since it uses less digits than its factorization.

6442775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257721 (or 257716 counting only the distinct ones).

The product of its digits is 47040, while the sum is 35.

The square root of 6442775 is about 2538.2622007980. The cubic root of 6442775 is about 186.0762684871.

The spelling of 6442775 in words is "six million, four hundred forty-two thousand, seven hundred seventy-five".