1140591081 has 48 divisors (see below), whose sum is σ = 1892108160. Its totient is φ = 607219200.

The previous prime is 1140591079. The next prime is 1140591103. The reversal of 1140591081 is 1801950411.

It is a happy number.

It is not a de Polignac number, because 1140591081 - 2¹ = 1140591079 is a prime.

It is a super-3 number, since 3×1140591081³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (1140591041) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 250140 + ... + 254658.

It is an arithmetic number, because the mean of its divisors is an integer number (39418920).

Almost surely, 2^1140591081 is an apocalyptic number.

It is an amenable number.

1140591081 is a deficient number, since it is larger than the sum of its proper divisors (751517079).

1140591081 is a wasteful number, since it uses less digits than its factorization.

1140591081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4654 (or 4647 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 30.

The square root of 1140591081 is about 33772.6380521273. The cubic root of 1140591081 is about 1044.8244421703.

The spelling of 1140591081 in words is "one billion, one hundred forty million, five hundred ninety-one thousand, eighty-one".