2112345 has 16 divisors (see below), whose sum is σ = 3755520. Its totient is φ = 1126512.

The previous prime is 2112337. The next prime is 2112347. The reversal of 2112345 is 5432112.

It is not a de Polignac number, because 2112345 - 2³ = 2112337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2112347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7689 + ... + 7958.

It is an arithmetic number, because the mean of its divisors is an integer number (234720).

2^2112345 is an apocalyptic number.

It is an amenable number.

2112345 is a deficient number, since it is larger than the sum of its proper divisors (1643175).

2112345 is a wasteful number, since it uses less digits than its factorization.

2112345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15661 (or 15655 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 2112345 is about 1453.3908627757. The cubic root of 2112345 is about 128.3083589264.

Adding to 2112345 its reverse (5432112), we get a palindrome (7544457).

It can be divided in two parts, 211 and 2345, that added together give a triangular number (2556 = T₇₁).

The spelling of 2112345 in words is "two million, one hundred twelve thousand, three hundred forty-five".