6721542124 has 24 divisors (see below), whose sum is σ = 12917028096. Its totient is φ = 3035010000.

The previous prime is 6721542089. The next prime is 6721542167. The reversal of 6721542124 is 4212451276.

It is a self number, because there is not a number n which added to its sum of digits gives 6721542124.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 499192 + ... + 512479.

It is an arithmetic number, because the mean of its divisors is an integer number (538209504).

Almost surely, 2^6721542124 is an apocalyptic number.

It is an amenable number.

6721542124 is a deficient number, since it is larger than the sum of its proper divisors (6195485972).

6721542124 is a wasteful number, since it uses less digits than its factorization.

6721542124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011837 (or 1011835 counting only the distinct ones).

The product of its digits is 26880, while the sum is 34.

The square root of 6721542124 is about 81985.0115813860. The cubic root of 6721542124 is about 1887.2219316636.

It can be divided in two parts, 6721 and 542124, that added together give a palindrome (548845).

The spelling of 6721542124 in words is "six billion, seven hundred twenty-one million, five hundred forty-two thousand, one hundred twenty-four".