1721060516 has 36 divisors (see below), whose sum is σ = 3521818188. Its totient is φ = 733759488.

The previous prime is 1721060479. The next prime is 1721060543. The reversal of 1721060516 is 6150601271.

It can be written as a sum of positive squares in 2 ways, for example, as 349839616 + 1371220900 = 18704^2 + 37030^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15080 + ... + 60576.

It is an arithmetic number, because the mean of its divisors is an integer number (97828283).

Almost surely, 2^1721060516 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1721060516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1760909094).

1721060516 is an abundant number, since it is smaller than the sum of its proper divisors (1800757672).

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

1721060516 is a wasteful number, since it uses less digits than its factorization.

1721060516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45708 (or 45699 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 1721060516 is about 41485.6663921408. Note that the first 3 decimals coincide. The cubic root of 1721060516 is about 1198.3914828201.

Adding to 1721060516 its reverse (6150601271), we get a palindrome (7871661787).

The spelling of 1721060516 in words is "one billion, seven hundred twenty-one million, sixty thousand, five hundred sixteen".