11142220 has 24 divisors (see below), whose sum is σ = 23562000. Its totient is φ = 4425792.

The previous prime is 11142211. The next prime is 11142223. The reversal of 11142220 is 2224111.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 11142220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11142223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1111 + ... + 4849.

It is an arithmetic number, because the mean of its divisors is an integer number (981750).

Almost surely, 2^11142220 is an apocalyptic number.

11142220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11142220 is an abundant number, since it is smaller than the sum of its proper divisors (12419780).

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

11142220 is a wasteful number, since it uses less digits than its factorization.

11142220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3897 (or 3895 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 11142220 is about 3337.9964050310. The cubic root of 11142220 is about 223.3523757927.

Adding to 11142220 its reverse (2224111), we get a palindrome (13366331).

The spelling of 11142220 in words is "eleven million, one hundred forty-two thousand, two hundred twenty".