6721126 has 4 divisors (see below), whose sum is σ = 10081692. Its totient is φ = 3360562.

The previous prime is 6721123. The next prime is 6721133. The reversal of 6721126 is 6211276.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 6721126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6721123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1680280 + ... + 1680283.

It is an arithmetic number, because the mean of its divisors is an integer number (2520423).

Almost surely, 2^6721126 is an apocalyptic number.

6721126 is a deficient number, since it is larger than the sum of its proper divisors (3360566).

6721126 is a wasteful number, since it uses less digits than its factorization.

6721126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3360565.

The product of its digits is 1008, while the sum is 25.

The square root of 6721126 is about 2592.5134522313. The cubic root of 6721126 is about 188.7182985515.

The spelling of 6721126 in words is "six million, seven hundred twenty-one thousand, one hundred twenty-six".