11443921 has 2 divisors, whose sum is σ = 11443922. Its totient is φ = 11443920.

The previous prime is 11443897. The next prime is 11443931. The reversal of 11443921 is 12934411.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8346321 + 3097600 = 2889^2 + 1760^2 .

It is a cyclic number.

It is not a de Polignac number, because 11443921 - 2⁷ = 11443793 is a prime.

It is equal to p₇₅₃₈₂₀ and since 11443921 and 753820 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (11443931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5721960 + 5721961.

It is an arithmetic number, because the mean of its divisors is an integer number (5721961).

Almost surely, 2^11443921 is an apocalyptic number.

It is an amenable number.

11443921 is a deficient number, since it is larger than the sum of its proper divisors (1).

11443921 is an equidigital number, since it uses as much as digits as its factorization.

11443921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

The square root of 11443921 is about 3382.8864893756. The cubic root of 11443921 is about 225.3503742719.

The spelling of 11443921 in words is "eleven million, four hundred forty-three thousand, nine hundred twenty-one".