1140561765 has 96 divisors (see below), whose sum is σ = 2346319872. Its totient is φ = 501552000.

The previous prime is 1140561761. The next prime is 1140561769. The reversal of 1140561765 is 5671650411.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1140561761) and next prime (1140561769).

It is not a de Polignac number, because 1140561765 - 2² = 1140561761 is a prime.

It is a super-2 number, since 2×1140561765² = 2601762279559830450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140561761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2646100 + ... + 2646530.

It is an arithmetic number, because the mean of its divisors is an integer number (24440832).

Almost surely, 2^1140561765 is an apocalyptic number.

1140561765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1140561765 is an abundant number, since it is smaller than the sum of its proper divisors (1205758107).

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

1140561765 is a wasteful number, since it uses less digits than its factorization.

1140561765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751 (or 748 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 1140561765 is about 33772.2040293493. The cubic root of 1140561765 is about 1044.8154905731.

The spelling of 1140561765 in words is "one billion, one hundred forty million, five hundred sixty-one thousand, seven hundred sixty-five".