1721611412 has 12 divisors (see below), whose sum is σ = 3110007936. Its totient is φ = 833037720.

The previous prime is 1721611399. The next prime is 1721611417. The reversal of 1721611412 is 2141161271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1721611417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6941858 + ... + 6942105.

It is an arithmetic number, because the mean of its divisors is an integer number (259167328).

Almost surely, 2^1721611412 is an apocalyptic number.

It is an amenable number.

1721611412 is a deficient number, since it is larger than the sum of its proper divisors (1388396524).

1721611412 is a wasteful number, since it uses less digits than its factorization.

1721611412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13883998 (or 13883996 counting only the distinct ones).

The product of its digits is 672, while the sum is 26.

The square root of 1721611412 is about 41492.3054553492. The cubic root of 1721611412 is about 1198.5193339600.

Adding to 1721611412 its reverse (2141161271), we get a palindrome (3862772683).

The spelling of 1721611412 in words is "one billion, seven hundred twenty-one million, six hundred eleven thousand, four hundred twelve".