11749421 has 2 divisors, whose sum is σ = 11749422. Its totient is φ = 11749420.

The previous prime is 11749399. The next prime is 11749427. The reversal of 11749421 is 12494711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8491396 + 3258025 = 2914^2 + 1805^2 .

It is a cyclic number.

It is not a de Polignac number, because 11749421 - 2¹⁰ = 11748397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11749427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5874710 + 5874711.

It is an arithmetic number, because the mean of its divisors is an integer number (5874711).

Almost surely, 2^11749421 is an apocalyptic number.

It is an amenable number.

11749421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11749421 is an equidigital number, since it uses as much as digits as its factorization.

11749421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 29.

The square root of 11749421 is about 3427.7428433300. The cubic root of 11749421 is about 227.3380629175.

The spelling of 11749421 in words is "eleven million, seven hundred forty-nine thousand, four hundred twenty-one".