6440126 has 64 divisors (see below), whose sum is σ = 13271040. Its totient is φ = 2268000.

The previous prime is 6440113. The next prime is 6440131. The reversal of 6440126 is 6210446.

It is a happy 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 31 ways as a sum of consecutive naturals, for example, 90671 + ... + 90741.

It is an arithmetic number, because the mean of its divisors is an integer number (207360).

Almost surely, 2^6440126 is an apocalyptic number.

6440126 is an abundant number, since it is smaller than the sum of its proper divisors (6830914).

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

6440126 is a wasteful number, since it uses less digits than its factorization.

6440126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 6440126 is about 2537.7403334463. The cubic root of 6440126 is about 186.0507627277.

The spelling of 6440126 in words is "six million, four hundred forty thousand, one hundred twenty-six".