11529421 has 2 divisors, whose sum is σ = 11529422. Its totient is φ = 11529420.

The previous prime is 11529403. The next prime is 11529431. The reversal of 11529421 is 12492511.

It is a happy number.

11529421 is digitally balanced in base 3, 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., 11485321 + 44100 = 3389^2 + 210^2 .

It is an emirp because it is prime and its reverse (12492511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11529421 - 2⁵ = 11529389 is a prime.

It is the 3396-th Hogben number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11529431) by changing a digit.

It is a nontrivial repunit in base 3395.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5764710 + 5764711.

It is an arithmetic number, because the mean of its divisors is an integer number (5764711).

Almost surely, 2^11529421 is an apocalyptic number.

It is an amenable number.

11529421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11529421 is an equidigital number, since it uses as much as digits as its factorization.

11529421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 25.

The square root of 11529421 is about 3395.5001104403. The cubic root of 11529421 is about 225.9101961315.

The spelling of 11529421 in words is "eleven million, five hundred twenty-nine thousand, four hundred twenty-one".