11554021 has 2 divisors, whose sum is σ = 11554022. Its totient is φ = 11554020.

The previous prime is 11554019. The next prime is 11554051. The reversal of 11554021 is 12045511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9523396 + 2030625 = 3086^2 + 1425^2 .

It is a cyclic number.

It is not a de Polignac number, because 11554021 - 2¹ = 11554019 is a prime.

Together with 11554019, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 11554021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11554001) 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, 5777010 + 5777011.

It is an arithmetic number, because the mean of its divisors is an integer number (5777011).

Almost surely, 2^11554021 is an apocalyptic number.

It is an amenable number.

11554021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11554021 is an equidigital number, since it uses as much as digits as its factorization.

11554021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 11554021 is about 3399.1206215726. The cubic root of 11554021 is about 226.0707547277.

Adding to 11554021 its reverse (12045511), we get a palindrome (23599532).

The spelling of 11554021 in words is "eleven million, five hundred fifty-four thousand, twenty-one".