2130845 has 8 divisors (see below), whose sum is σ = 2569560. Its totient is φ = 1696320.

The previous prime is 2130809. The next prime is 2130853. The reversal of 2130845 is 5480312.

It can be written as a sum of positive squares in 4 ways, for example, as 88804 + 2042041 = 298^2 + 1429^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2130845 - 2¹⁰ = 2129821 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2130845.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215 + ... + 2075.

It is an arithmetic number, because the mean of its divisors is an integer number (321195).

2^2130845 is an apocalyptic number.

It is an amenable number.

2130845 is a deficient number, since it is larger than the sum of its proper divisors (438715).

2130845 is a wasteful number, since it uses less digits than its factorization.

2130845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2095.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 2130845 is about 1459.7414154569. The cubic root of 2130845 is about 128.6818472369.

The spelling of 2130845 in words is "two million, one hundred thirty thousand, eight hundred forty-five".