2130729 has 16 divisors (see below), whose sum is σ = 3084480. Its totient is φ = 1303040.

The previous prime is 2130727. The next prime is 2130757. The reversal of 2130729 is 9270312.

It is a cyclic number.

It is not a de Polignac number, because 2130729 - 2¹ = 2130727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2130699 and 2130708.

It is not an unprimeable number, because it can be changed into a prime (2130721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1582 + ... + 2600.

It is an arithmetic number, because the mean of its divisors is an integer number (192780).

2^2130729 is an apocalyptic number.

It is an amenable number.

2130729 is a deficient number, since it is larger than the sum of its proper divisors (953751).

2130729 is a wasteful number, since it uses less digits than its factorization.

2130729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 2130729 is about 1459.7016818515. The cubic root of 2130729 is about 128.6795121124.

The spelling of 2130729 in words is "two million, one hundred thirty thousand, seven hundred twenty-nine".