2113145 has 8 divisors (see below), whose sum is σ = 2562504. Its totient is φ = 1672704.

The previous prime is 2113129. The next prime is 2113147. The reversal of 2113145 is 5413112.

2113145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 822649 + 1290496 = 907^2 + 1136^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2113145 - 2⁴ = 2113129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2113147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1694 + ... + 2663.

It is an arithmetic number, because the mean of its divisors is an integer number (320313).

2^2113145 is an apocalyptic number.

It is an amenable number.

2113145 is a deficient number, since it is larger than the sum of its proper divisors (449359).

2113145 is an equidigital number, since it uses as much as digits as its factorization.

2113145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4459.

The product of its digits is 120, while the sum is 17.

The square root of 2113145 is about 1453.6660551860. Note that the first 3 decimals coincide. The cubic root of 2113145 is about 128.3245547864.

Adding to 2113145 its reverse (5413112), we get a palindrome (7526257).

The spelling of 2113145 in words is "two million, one hundred thirteen thousand, one hundred forty-five".