11123406 has 80 divisors (see below), whose sum is σ = 30213216. Its totient is φ = 2985984.

The previous prime is 11123393. The next prime is 11123471. The reversal of 11123406 is 60432111.

It is a happy number.

It is a super-2 number, since 2×11123406² = 247460322081672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 18990 + ... + 19566.

Almost surely, 2^11123406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11123406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15106608).

11123406 is an abundant number, since it is smaller than the sum of its proper divisors (19089810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11123406 is a wasteful number, since it uses less digits than its factorization.

11123406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615 (or 606 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 11123406 is about 3335.1770567693. The cubic root of 11123406 is about 223.2265923918.

Adding to 11123406 its reverse (60432111), we get a palindrome (71555517).

The spelling of 11123406 in words is "eleven million, one hundred twenty-three thousand, four hundred six".