11673421 has 4 divisors (see below), whose sum is σ = 11747932. Its totient is φ = 11598912.

The previous prime is 11673419. The next prime is 11673451. The reversal of 11673421 is 12437611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12437611 = 467 ⋅26633.

It can be written as a sum of positive squares in 2 ways, for example, as 6056521 + 5616900 = 2461^2 + 2370^2 .

It is a cyclic number.

It is not a de Polignac number, because 11673421 - 2¹ = 11673419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11673401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37020 + ... + 37333.

It is an arithmetic number, because the mean of its divisors is an integer number (2936983).

Almost surely, 2^11673421 is an apocalyptic number.

It is an amenable number.

11673421 is a deficient number, since it is larger than the sum of its proper divisors (74511).

11673421 is an equidigital number, since it uses as much as digits as its factorization.

11673421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74510.

The product of its digits is 1008, while the sum is 25.

The square root of 11673421 is about 3416.6388454152. The cubic root of 11673421 is about 226.8468307605.

It can be divided in two parts, 116 and 73421, that added together give a palindrome (73537).

The spelling of 11673421 in words is "eleven million, six hundred seventy-three thousand, four hundred twenty-one".