1131154040 has 64 divisors (see below), whose sum is σ = 2651616000. Its totient is φ = 433797120.

The previous prime is 1131154027. The next prime is 1131154051. The reversal of 1131154040 is 404511311.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130976 + ... + 139344.

It is an arithmetic number, because the mean of its divisors is an integer number (41431500).

Almost surely, 2^1131154040 is an apocalyptic number.

1131154040 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 1131154040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1325808000).

1131154040 is an abundant number, since it is smaller than the sum of its proper divisors (1520461960).

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

1131154040 is a wasteful number, since it uses less digits than its factorization.

1131154040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8520 (or 8516 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1131154040 is about 33632.6335573056. The cubic root of 1131154040 is about 1041.9348964572.

Adding to 1131154040 its reverse (404511311), we get a palindrome (1535665351).

The spelling of 1131154040 in words is "one billion, one hundred thirty-one million, one hundred fifty-four thousand, forty".