6444142 has 8 divisors (see below), whose sum is σ = 9927576. Its totient is φ = 3134952.

The previous prime is 6444121. The next prime is 6444161. The reversal of 6444142 is 2414446.

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

It is a super-2 number, since 2×6444142² = 83053932232328, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 43468 + ... + 43615.

It is an arithmetic number, because the mean of its divisors is an integer number (1240947).

Almost surely, 2^6444142 is an apocalyptic number.

6444142 is a deficient number, since it is larger than the sum of its proper divisors (3483434).

6444142 is a wasteful number, since it uses less digits than its factorization.

6444142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87122.

The product of its digits is 3072, while the sum is 25.

The square root of 6444142 is about 2538.5314652373. The cubic root of 6444142 is about 186.0894278411.

Adding to 6444142 its reverse (2414446), we get a palindrome (8858588).

The spelling of 6444142 in words is "six million, four hundred forty-four thousand, one hundred forty-two".