11123420 has 96 divisors (see below), whose sum is σ = 30191616. Its totient is φ = 3340800.

The previous prime is 11123393. The next prime is 11123471. The reversal of 11123420 is 2432111.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 11123395 and 11123404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47624 + ... + 47856.

It is an arithmetic number, because the mean of its divisors is an integer number (314496).

Almost surely, 2^11123420 is an apocalyptic number.

11123420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11123420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15095808).

11123420 is an abundant number, since it is smaller than the sum of its proper divisors (19068196).

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

11123420 is a wasteful number, since it uses less digits than its factorization.

11123420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291 (or 289 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 11123420 is about 3335.1791556077. The cubic root of 11123420 is about 223.2266860433.

Adding to 11123420 its reverse (2432111), we get a palindrome (13555531).

The spelling of 11123420 in words is "eleven million, one hundred twenty-three thousand, four hundred twenty".