11564421 has 8 divisors (see below), whose sum is σ = 16821024. Its totient is φ = 7008720.

The previous prime is 11564381. The next prime is 11564447. The reversal of 11564421 is 12446511.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11564421 - 2¹⁰ = 11563397 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11564391 and 11564400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11564621) 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 in 7 ways as a sum of consecutive naturals, for example, 175186 + ... + 175251.

It is an arithmetic number, because the mean of its divisors is an integer number (2102628).

Almost surely, 2^11564421 is an apocalyptic number.

11564421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11564421 is a deficient number, since it is larger than the sum of its proper divisors (5256603).

11564421 is a wasteful number, since it uses less digits than its factorization.

11564421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350451.

The product of its digits is 960, while the sum is 24.

The square root of 11564421 is about 3400.6500849102. The cubic root of 11564421 is about 226.1385646203.

The spelling of 11564421 in words is "eleven million, five hundred sixty-four thousand, four hundred twenty-one".