1721072712 has 16 divisors (see below), whose sum is σ = 4302681840. Its totient is φ = 573690896.

The previous prime is 1721072701. The next prime is 1721072729. The reversal of 1721072712 is 2172701271.

It is a self number, because there is not a number n which added to its sum of digits gives 1721072712.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35855658 + ... + 35855705.

It is an arithmetic number, because the mean of its divisors is an integer number (268917615).

Almost surely, 2^1721072712 is an apocalyptic number.

1721072712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1721072712 is an abundant number, since it is smaller than the sum of its proper divisors (2581609128).

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

1721072712 is a wasteful number, since it uses less digits than its factorization.

1721072712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71711372 (or 71711368 counting only the distinct ones).

The product of its (nonzero) digits is 2744, while the sum is 30.

The square root of 1721072712 is about 41485.8133824082. The cubic root of 1721072712 is about 1198.3943135452.

Adding to 1721072712 its reverse (2172701271), we get a palindrome (3893773983).

The spelling of 1721072712 in words is "one billion, seven hundred twenty-one million, seventy-two thousand, seven hundred twelve".