11785021 has 2 divisors, whose sum is σ = 11785022. Its totient is φ = 11785020.

The previous prime is 11785019. The next prime is 11785031. The reversal of 11785021 is 12058711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9696996 + 2088025 = 3114^2 + 1445^2 .

It is a cyclic number.

It is not a de Polignac number, because 11785021 - 2¹ = 11785019 is a prime.

Together with 11785019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11785001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5892510 + 5892511.

It is an arithmetic number, because the mean of its divisors is an integer number (5892511).

Almost surely, 2^11785021 is an apocalyptic number.

It is an amenable number.

11785021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11785021 is an equidigital number, since it uses as much as digits as its factorization.

11785021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 25.

The square root of 11785021 is about 3432.9318373658. The cubic root of 11785021 is about 227.5674380438.

The spelling of 11785021 in words is "eleven million, seven hundred eighty-five thousand, twenty-one".