11403421 has 4 divisors (see below), whose sum is σ = 11485600. Its totient is φ = 11321244.

The previous prime is 11403391. The next prime is 11403433. The reversal of 11403421 is 12430411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11403421 - 2⁵ = 11403389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11403395 and 11403404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11403451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40881 + ... + 41158.

It is an arithmetic number, because the mean of its divisors is an integer number (2871400).

Almost surely, 2^11403421 is an apocalyptic number.

It is an amenable number.

11403421 is a deficient number, since it is larger than the sum of its proper divisors (82179).

11403421 is an equidigital number, since it uses as much as digits as its factorization.

11403421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82178.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 11403421 is about 3376.8951716036. The cubic root of 11403421 is about 225.0842219681.

Adding to 11403421 its reverse (12430411), we get a palindrome (23833832).

The spelling of 11403421 in words is "eleven million, four hundred three thousand, four hundred twenty-one".