1131645120 has 112 divisors (see below), whose sum is σ = 3804379488. Its totient is φ = 284016640.

The previous prime is 1131645083. The next prime is 1131645127. The reversal of 1131645120 is 215461311.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (1131645127) 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, 18351 + ... + 50990.

It is an arithmetic number, because the mean of its divisors is an integer number (33967674).

Almost surely, 2^1131645120 is an apocalyptic number.

1131645120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131645120 is an abundant number, since it is smaller than the sum of its proper divisors (2672734368).

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

1131645120 is a wasteful number, since it uses less digits than its factorization.

1131645120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69378 (or 69368 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1131645120 is about 33639.9334125381. The cubic root of 1131645120 is about 1042.0856567553.

The spelling of 1131645120 in words is "one billion, one hundred thirty-one million, six hundred forty-five thousand, one hundred twenty".