2130705 has 20 divisors (see below), whose sum is σ = 3820212. Its totient is φ = 1136160.

The previous prime is 2130703. The next prime is 2130721. The reversal of 2130705 is 5070312.

2130705 is nontrivially palindromic in base 14.

It can be written as a sum of positive squares in 2 ways, for example, as 1185921 + 944784 = 1089^2 + 972^2 .

It is not a de Polignac number, because 2130705 - 2¹ = 2130703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2130701) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2226 + ... + 3035.

2^2130705 is an apocalyptic number.

It is an amenable number.

2130705 is a deficient number, since it is larger than the sum of its proper divisors (1689507).

2130705 is an equidigital number, since it uses as much as digits as its factorization.

2130705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5278 (or 5269 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 18.

The square root of 2130705 is about 1459.6934609705. The cubic root of 2130705 is about 128.6790289726.

The spelling of 2130705 in words is "two million, one hundred thirty thousand, seven hundred five".