2112145 has 24 divisors (see below), whose sum is σ = 3041064. Its totient is φ = 1403136.

The previous prime is 2112139. The next prime is 2112151. The reversal of 2112145 is 5412112.

It is an interprime number because it is at equal distance from previous prime (2112139) and next prime (2112151).

It can be written as a sum of positive squares in 4 ways, for example, as 305809 + 1806336 = 553^2 + 1344^2 .

It is not a de Polignac number, because 2112145 - 2⁷ = 2112017 is a prime.

It is a super-2 number, since 2×2112145² = 8922313002050, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8949 + ... + 9181.

It is an arithmetic number, because the mean of its divisors is an integer number (126711).

2^2112145 is an apocalyptic number.

It is an amenable number.

2112145 is a deficient number, since it is larger than the sum of its proper divisors (928919).

2112145 is a wasteful number, since it uses less digits than its factorization.

2112145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289 (or 282 counting only the distinct ones).

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

The square root of 2112145 is about 1453.3220565312. The cubic root of 2112145 is about 128.3043093225.

Adding to 2112145 its reverse (5412112), we get a palindrome (7524257).

The spelling of 2112145 in words is "two million, one hundred twelve thousand, one hundred forty-five".