6649142 has 16 divisors (see below), whose sum is σ = 10614240. Its totient is φ = 3113088.

The previous prime is 6649141. The next prime is 6649151. The reversal of 6649142 is 2419466.

It is a happy number.

It is a super-2 number, since 2×6649142² = 88422178672328, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6649099 and 6649108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6649141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8783 + ... + 9509.

It is an arithmetic number, because the mean of its divisors is an integer number (663390).

Almost surely, 2^6649142 is an apocalyptic number.

6649142 is a deficient number, since it is larger than the sum of its proper divisors (3965098).

6649142 is a wasteful number, since it uses less digits than its factorization.

6649142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015.

The product of its digits is 10368, while the sum is 32.

The square root of 6649142 is about 2578.5930272146. The cubic root of 6649142 is about 188.0421476349.

The spelling of 6649142 in words is "six million, six hundred forty-nine thousand, one hundred forty-two".