11231142 has 32 divisors (see below), whose sum is σ = 24430560. Its totient is φ = 3421440.

The previous prime is 11231141. The next prime is 11231159. The reversal of 11231142 is 24113211.

It is a super-2 number, since 2×11231142² = 252277101248328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11231141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7842 + ... + 9162.

It is an arithmetic number, because the mean of its divisors is an integer number (763455).

Almost surely, 2^11231142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11231142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12215280).

11231142 is an abundant number, since it is smaller than the sum of its proper divisors (13199418).

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

11231142 is a wasteful number, since it uses less digits than its factorization.

11231142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1448.

The product of its digits is 48, while the sum is 15.

The square root of 11231142 is about 3351.2896025262. The cubic root of 11231142 is about 223.9449668162.

Adding to 11231142 its reverse (24113211), we get a palindrome (35344353).

The spelling of 11231142 in words is "eleven million, two hundred thirty-one thousand, one hundred forty-two".