2125813 has 2 divisors, whose sum is σ = 2125814. Its totient is φ = 2125812.

The previous prime is 2125801. The next prime is 2125819. The reversal of 2125813 is 3185212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2125764 + 49 = 1458^2 + 7^2 .

It is a cyclic number.

It is not a de Polignac number, because 2125813 - 2²¹ = 28661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2125819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062906 + 1062907.

It is an arithmetic number, because the mean of its divisors is an integer number (1062907).

2^2125813 is an apocalyptic number.

It is an amenable number.

2125813 is a deficient number, since it is larger than the sum of its proper divisors (1).

2125813 is an equidigital number, since it uses as much as digits as its factorization.

2125813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 480, while the sum is 22.

The square root of 2125813 is about 1458.0168037440. The cubic root of 2125813 is about 128.5804731439.

The spelling of 2125813 in words is "two million, one hundred twenty-five thousand, eight hundred thirteen".