6445242 has 12 divisors (see below), whose sum is σ = 13964730. Its totient is φ = 2148408.

The previous prime is 6445223. The next prime is 6445247. The reversal of 6445242 is 2425446.

It can be written as a sum of positive squares in only one way, i.e., 6095961 + 349281 = 2469^2 + 591^2 .

It is a super-2 number, since 2×6445242² = 83082288877128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6445247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 179017 + ... + 179052.

Almost surely, 2^6445242 is an apocalyptic number.

6445242 is an abundant number, since it is smaller than the sum of its proper divisors (7519488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6445242 is a wasteful number, since it uses less digits than its factorization.

6445242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358077 (or 358074 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 6445242 is about 2538.7481166906. The cubic root of 6445242 is about 186.1000155823.

It can be divided in two parts, 644 and 5242, that added together give a triangular number (5886 = T₁₀₈).

The spelling of 6445242 in words is "six million, four hundred forty-five thousand, two hundred forty-two".