2130965 has 4 divisors (see below), whose sum is σ = 2557164. Its totient is φ = 1704768.

The previous prime is 2130959. The next prime is 2130979. The reversal of 2130965 is 5690312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1615441 + 515524 = 1271^2 + 718^2 .

It is a cyclic number.

It is not a de Polignac number, because 2130965 - 2⁶ = 2130901 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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, 213092 + ... + 213101.

It is an arithmetic number, because the mean of its divisors is an integer number (639291).

2^2130965 is an apocalyptic number.

It is an amenable number.

2130965 is a deficient number, since it is larger than the sum of its proper divisors (426199).

2130965 is an equidigital number, since it uses as much as digits as its factorization.

2130965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426198.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 2130965 is about 1459.7825180485. The cubic root of 2130965 is about 128.6842627937.

The spelling of 2130965 in words is "two million, one hundred thirty thousand, nine hundred sixty-five".