2142123445 has 48 divisors (see below), whose sum is σ = 3294165888. Its totient is φ = 1322213760.

The previous prime is 2142123421. The next prime is 2142123449. The reversal of 2142123445 is 5443212412.

It is not a de Polignac number, because 2142123445 - 2⁵ = 2142123413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142123449) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 273727 + ... + 281443.

It is an arithmetic number, because the mean of its divisors is an integer number (68628456).

Almost surely, 2^2142123445 is an apocalyptic number.

It is an amenable number.

2142123445 is a deficient number, since it is larger than the sum of its proper divisors (1152042443).

2142123445 is a wasteful number, since it uses less digits than its factorization.

2142123445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7850 (or 7843 counting only the distinct ones).

The product of its digits is 7680, while the sum is 28.

The square root of 2142123445 is about 46283.0794675549. The cubic root of 2142123445 is about 1289.0848315431.

Adding to 2142123445 its reverse (5443212412), we get a palindrome (7585335857).

The spelling of 2142123445 in words is "two billion, one hundred forty-two million, one hundred twenty-three thousand, four hundred forty-five".