12721773 has 16 divisors (see below), whose sum is σ = 17937920. Its totient is φ = 7997616.

The previous prime is 12721771. The next prime is 12721777. The reversal of 12721773 is 37712721.

12721773 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12721773 - 2¹ = 12721771 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12721773.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12721771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17136 + ... + 17862.

It is an arithmetic number, because the mean of its divisors is an integer number (1121120).

Almost surely, 2^12721773 is an apocalyptic number.

It is an amenable number.

12721773 is a deficient number, since it is larger than the sum of its proper divisors (5216147).

12721773 is a wasteful number, since it uses less digits than its factorization.

12721773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056.

The product of its digits is 4116, while the sum is 30.

The square root of 12721773 is about 3566.7594536217. The cubic root of 12721773 is about 233.4439092681.

The spelling of 12721773 in words is "twelve million, seven hundred twenty-one thousand, seven hundred seventy-three".