1721171060 has 72 divisors (see below), whose sum is σ = 4211036424. Its totient is φ = 589209600.

The previous prime is 1721171051. The next prime is 1721171063. The reversal of 1721171060 is 601711271.

It can be written as a sum of positive squares in 4 ways, for example, as 513747556 + 1207423504 = 22666^2 + 34748^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1721171063) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1074260 + ... + 1075860.

It is an arithmetic number, because the mean of its divisors is an integer number (58486617).

Almost surely, 2^1721171060 is an apocalyptic number.

1721171060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1721171060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2105518212).

1721171060 is an abundant number, since it is smaller than the sum of its proper divisors (2489865364).

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

1721171060 is a wasteful number, since it uses less digits than its factorization.

1721171060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2721 (or 2712 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 26.

The square root of 1721171060 is about 41486.9986863355. The cubic root of 1721171060 is about 1198.4171398981.

The spelling of 1721171060 in words is "one billion, seven hundred twenty-one million, one hundred seventy-one thousand, sixty".