11974021 has 2 divisors, whose sum is σ = 11974022. Its totient is φ = 11974020.

The previous prime is 11974019. The next prime is 11974033. The reversal of 11974021 is 12047911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11189025 + 784996 = 3345^2 + 886^2 .

It is an emirp because it is prime and its reverse (12047911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11974021 - 2¹ = 11974019 is a prime.

Together with 11974019, 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 (11974121) 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, 5987010 + 5987011.

It is an arithmetic number, because the mean of its divisors is an integer number (5987011).

Almost surely, 2^11974021 is an apocalyptic number.

It is an amenable number.

11974021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11974021 is an equidigital number, since it uses as much as digits as its factorization.

11974021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 11974021 is about 3460.3498378054. The cubic root of 11974021 is about 228.7775150794. Note that the first 3 decimals are identical.

The spelling of 11974021 in words is "eleven million, nine hundred seventy-four thousand, twenty-one".