11545421 has 2 divisors, whose sum is σ = 11545422. Its totient is φ = 11545420.

The previous prime is 11545403. The next prime is 11545433. The reversal of 11545421 is 12454511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9030025 + 2515396 = 3005^2 + 1586^2 .

It is a cyclic number.

It is not a de Polignac number, because 11545421 - 2¹⁸ = 11283277 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11541421) 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, 5772710 + 5772711.

It is an arithmetic number, because the mean of its divisors is an integer number (5772711).

Almost surely, 2^11545421 is an apocalyptic number.

It is an amenable number.

11545421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11545421 is an equidigital number, since it uses as much as digits as its factorization.

11545421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 800, while the sum is 23.

The square root of 11545421 is about 3397.8553530131. The cubic root of 11545421 is about 226.0146504195.

Adding to 11545421 its reverse (12454511), we get a palindrome (23999932).

The spelling of 11545421 in words is "eleven million, five hundred forty-five thousand, four hundred twenty-one".