11090421 has 6 divisors (see below), whose sum is σ = 16019510. Its totient is φ = 7393608.

The previous prime is 11090419. The next prime is 11090461. The reversal of 11090421 is 12409011.

11090421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11088900 + 1521 = 3330^2 + 39^2 .

It is not a de Polignac number, because 11090421 - 2¹ = 11090419 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 11090394 and 11090403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11090411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 616126 + ... + 616143.

Almost surely, 2^11090421 is an apocalyptic number.

It is an amenable number.

11090421 is a deficient number, since it is larger than the sum of its proper divisors (4929089).

11090421 is a wasteful number, since it uses less digits than its factorization.

11090421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1232275 (or 1232272 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 11090421 is about 3330.2283705476. The cubic root of 11090421 is about 223.0057242124.

Adding to 11090421 its reverse (12409011), we get a palindrome (23499432).

It can be divided in two parts, 11090 and 421, that added together give a palindrome (11511).

The spelling of 11090421 in words is "eleven million, ninety thousand, four hundred twenty-one".