1131442140 has 48 divisors (see below), whose sum is σ = 3354396192. Its totient is φ = 283969536.

The previous prime is 1131442133. The next prime is 1131442141. The reversal of 1131442140 is 412441311.

It is a super-2 number, since 2×1131442140² = 2560322632335559200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131442141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 553609 + ... + 555648.

It is an arithmetic number, because the mean of its divisors is an integer number (69883254).

Almost surely, 2^1131442140 is an apocalyptic number.

1131442140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131442140 is an abundant number, since it is smaller than the sum of its proper divisors (2222954052).

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

1131442140 is a wasteful number, since it uses less digits than its factorization.

1131442140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109286 (or 1109284 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1131442140 is about 33636.9163271546. The cubic root of 1131442140 is about 1042.0233477060.

Adding to 1131442140 its reverse (412441311), we get a palindrome (1543883451).

The spelling of 1131442140 in words is "one billion, one hundred thirty-one million, four hundred forty-two thousand, one hundred forty".