11541421 has 2 divisors, whose sum is σ = 11541422. Its totient is φ = 11541420.

The previous prime is 11541407. The next prime is 11541427. The reversal of 11541421 is 12414511.

11541421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6320196 + 5221225 = 2514^2 + 2285^2 .

It is an emirp because it is prime and its reverse (12414511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11541421 - 2⁵ = 11541389 is a prime.

It is a super-3 number, since 3×11541421³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11541427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5770710 + 5770711.

It is an arithmetic number, because the mean of its divisors is an integer number (5770711).

Almost surely, 2^11541421 is an apocalyptic number.

It is an amenable number.

11541421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11541421 is an equidigital number, since it uses as much as digits as its factorization.

11541421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 160, while the sum is 19.

The square root of 11541421 is about 3397.2666954480. The cubic root of 11541421 is about 225.9885458993.

Adding to 11541421 its reverse (12414511), we get a palindrome (23955932).

The spelling of 11541421 in words is "eleven million, five hundred forty-one thousand, four hundred twenty-one".