11156442 has 40 divisors (see below), whose sum is σ = 24737280. Its totient is φ = 3354120.

The previous prime is 11156441. The next prime is 11156461. The reversal of 11156442 is 24465111.

It is a happy number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (11156441) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 87783 + ... + 87909.

It is an arithmetic number, because the mean of its divisors is an integer number (618432).

Almost surely, 2^11156442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11156442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12368640).

11156442 is an abundant number, since it is smaller than the sum of its proper divisors (13580838).

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

11156442 is an equidigital number, since it uses as much as digits as its factorization.

11156442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176 (or 143 counting only the distinct ones).

The product of its digits is 960, while the sum is 24.

The square root of 11156442 is about 3340.1260455258. The cubic root of 11156442 is about 223.4473648505.

It can be divided in two parts, 1115 and 6442, that added together give a palindrome (7557).

The spelling of 11156442 in words is "eleven million, one hundred fifty-six thousand, four hundred forty-two".