11445421 has 16 divisors (see below), whose sum is σ = 13023360. Its totient is φ = 9979200.

The previous prime is 11445419. The next prime is 11445443. The reversal of 11445421 is 12454411.

It is a cyclic number.

It is not a de Polignac number, because 11445421 - 2¹ = 11445419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11445392 and 11445401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11445481) 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 in 15 ways as a sum of consecutive naturals, for example, 30010 + ... + 30388.

It is an arithmetic number, because the mean of its divisors is an integer number (813960).

Almost surely, 2^11445421 is an apocalyptic number.

It is an amenable number.

11445421 is a deficient number, since it is larger than the sum of its proper divisors (1577939).

11445421 is a wasteful number, since it uses less digits than its factorization.

11445421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516.

The product of its digits is 640, while the sum is 22.

The square root of 11445421 is about 3383.1081862690. The cubic root of 11445421 is about 225.3602196968.

Adding to 11445421 its reverse (12454411), we get a palindrome (23899832).

The spelling of 11445421 in words is "eleven million, four hundred forty-five thousand, four hundred twenty-one".