11418421 has 12 divisors (see below), whose sum is σ = 13360800. Its totient is φ = 9729720.

The previous prime is 11418413. The next prime is 11418437. The reversal of 11418421 is 12481411.

It is not a de Polignac number, because 11418421 - 2³ = 11418413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11418392 and 11418401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11418401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9166 + ... + 10336.

It is an arithmetic number, because the mean of its divisors is an integer number (1113400).

Almost surely, 2^11418421 is an apocalyptic number.

It is an amenable number.

11418421 is a deficient number, since it is larger than the sum of its proper divisors (1942379).

11418421 is a wasteful number, since it uses less digits than its factorization.

11418421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384 (or 1377 counting only the distinct ones).

The product of its digits is 256, while the sum is 22.

The square root of 11418421 is about 3379.1154167918. The cubic root of 11418421 is about 225.1828702607.

Adding to 11418421 its reverse (12481411), we get a palindrome (23899832).

The spelling of 11418421 in words is "eleven million, four hundred eighteen thousand, four hundred twenty-one".