11948021 has 2 divisors, whose sum is σ = 11948022. Its totient is φ = 11948020.

The previous prime is 11947993. The next prime is 11948137. The reversal of 11948021 is 12084911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11464996 + 483025 = 3386^2 + 695^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11948021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11948221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5974010 + 5974011.

It is an arithmetic number, because the mean of its divisors is an integer number (5974011).

Almost surely, 2^11948021 is an apocalyptic number.

It is an amenable number.

11948021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11948021 is an equidigital number, since it uses as much as digits as its factorization.

11948021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 11948021 is about 3456.5909506333. The cubic root of 11948021 is about 228.6118083980.

The spelling of 11948021 in words is "eleven million, nine hundred forty-eight thousand, twenty-one".