1140581285 has 8 divisors (see below), whose sum is σ = 1379475456. Its totient is φ = 905279760.

The previous prime is 1140581263. The next prime is 1140581287. The reversal of 1140581285 is 5821850411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1140581285 - 2¹⁶ = 1140515749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140581287) 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 7 ways as a sum of consecutive naturals, for example, 897461 + ... + 898730.

It is an arithmetic number, because the mean of its divisors is an integer number (172434432).

Almost surely, 2^1140581285 is an apocalyptic number.

It is an amenable number.

1140581285 is a deficient number, since it is larger than the sum of its proper divisors (238894171).

1140581285 is a wasteful number, since it uses less digits than its factorization.

1140581285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1796323.

The product of its (nonzero) digits is 12800, while the sum is 35.

The square root of 1140581285 is about 33772.4930231690. The cubic root of 1140581285 is about 1044.8214509932.

The spelling of 1140581285 in words is "one billion, one hundred forty million, five hundred eighty-one thousand, two hundred eighty-five".