2111245 has 4 divisors (see below), whose sum is σ = 2533500. Its totient is φ = 1688992.

The previous prime is 2111231. The next prime is 2111251. The reversal of 2111245 is 5421112.

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 751689 + 1359556 = 867^2 + 1166^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2111245 is a prime.

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, 211120 + ... + 211129.

It is an arithmetic number, because the mean of its divisors is an integer number (633375).

2^2111245 is an apocalyptic number.

It is an amenable number.

2111245 is a deficient number, since it is larger than the sum of its proper divisors (422255).

2111245 is an equidigital number, since it uses as much as digits as its factorization.

2111245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422254.

The product of its digits is 80, while the sum is 16.

The square root of 2111245 is about 1453.0123881096. The cubic root of 2111245 is about 128.2860829407.

Adding to 2111245 its reverse (5421112), we get a palindrome (7532357).

The spelling of 2111245 in words is "two million, one hundred eleven thousand, two hundred forty-five".