1131001340 has 96 divisors (see below), whose sum is σ = 2788732800. Its totient is φ = 385125888.

The previous prime is 1131001309. The next prime is 1131001349. The reversal of 1131001340 is 431001311.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131001349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1186304 + ... + 1187256.

It is an arithmetic number, because the mean of its divisors is an integer number (29049300).

Almost surely, 2^1131001340 is an apocalyptic number.

1131001340 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 1131001340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1394366400).

1131001340 is an abundant number, since it is smaller than the sum of its proper divisors (1657731460).

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

1131001340 is a wasteful number, since it uses less digits than its factorization.

1131001340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156 (or 1140 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1131001340 is about 33630.3633640792. The cubic root of 1131001340 is about 1041.8880090564. Note that the first 3 decimals are identical.

Adding to 1131001340 its reverse (431001311), we get a palindrome (1562002651).

The spelling of 1131001340 in words is "one billion, one hundred thirty-one million, one thousand, three hundred forty".