1140494691 has 32 divisors (see below), whose sum is σ = 1848158208. Its totient is φ = 610698240.

The previous prime is 1140494659. The next prime is 1140494701. The reversal of 1140494691 is 1964940411.

1140494691 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1140494691 - 2⁵ = 1140494659 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1140494611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76326 + ... + 90036.

It is an arithmetic number, because the mean of its divisors is an integer number (57754944).

Almost surely, 2^1140494691 is an apocalyptic number.

1140494691 is a deficient number, since it is larger than the sum of its proper divisors (707663517).

1140494691 is a wasteful number, since it uses less digits than its factorization.

1140494691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13971.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 1140494691 is about 33771.2109791757. The cubic root of 1140494691 is about 1044.7950090495.

The spelling of 1140494691 in words is "one billion, one hundred forty million, four hundred ninety-four thousand, six hundred ninety-one".