11213405 has 24 divisors (see below), whose sum is σ = 16089048. Its totient is φ = 7475328.

The previous prime is 11213399. The next prime is 11213407. The reversal of 11213405 is 50431211.

It can be written as a sum of positive squares in 4 ways, for example, as 4468996 + 6744409 = 2114^2 + 2597^2 .

It is not a de Polignac number, because 11213405 - 2¹² = 11209309 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11213407) 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 23 ways as a sum of consecutive naturals, for example, 8447 + ... + 9683.

It is an arithmetic number, because the mean of its divisors is an integer number (670377).

Almost surely, 2^11213405 is an apocalyptic number.

It is an amenable number.

11213405 is a deficient number, since it is larger than the sum of its proper divisors (4875643).

11213405 is a wasteful number, since it uses less digits than its factorization.

11213405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293 (or 1286 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 11213405 is about 3348.6422621713. The cubic root of 11213405 is about 223.8270148833.

Adding to 11213405 its reverse (50431211), we get a palindrome (61644616).

The spelling of 11213405 in words is "eleven million, two hundred thirteen thousand, four hundred five".