2112780245 has 8 divisors (see below), whose sum is σ = 2558596920. Its totient is φ = 1674717120.

The previous prime is 2112780233. The next prime is 2112780251. The reversal of 2112780245 is 5420872112.

It can be written as a sum of positive squares in 4 ways, for example, as 793492561 + 1319287684 = 28169^2 + 36322^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-2112780245 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1937786 + ... + 1938875.

It is an arithmetic number, because the mean of its divisors is an integer number (319824615).

Almost surely, 2^2112780245 is an apocalyptic number.

It is an amenable number.

2112780245 is a deficient number, since it is larger than the sum of its proper divisors (445816675).

2112780245 is a wasteful number, since it uses less digits than its factorization.

2112780245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3876775.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 2112780245 is about 45964.9893397138. The cubic root of 2112780245 is about 1283.1717089236.

The spelling of 2112780245 in words is "two billion, one hundred twelve million, seven hundred eighty thousand, two hundred forty-five".