112787821 has 2 divisors, whose sum is σ = 112787822. Its totient is φ = 112787820.

The previous prime is 112787777. The next prime is 112787887. The reversal of 112787821 is 128787211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107433225 + 5354596 = 10365^2 + 2314^2 .

It is a cyclic number.

It is not a de Polignac number, because 112787821 - 2⁷ = 112787693 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (112787891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56393910 + 56393911.

It is an arithmetic number, because the mean of its divisors is an integer number (56393911).

Almost surely, 2^112787821 is an apocalyptic number.

It is an amenable number.

112787821 is a deficient number, since it is larger than the sum of its proper divisors (1).

112787821 is an equidigital number, since it uses as much as digits as its factorization.

112787821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12544, while the sum is 37.

The square root of 112787821 is about 10620.1610628088. The cubic root of 112787821 is about 483.1560278178.

The spelling of 112787821 in words is "one hundred twelve million, seven hundred eighty-seven thousand, eight hundred twenty-one".