1140012391 has 24 divisors (see below), whose sum is σ = 1342976544. Its totient is φ = 964837440.

The previous prime is 1140012373. The next prime is 1140012403. The reversal of 1140012391 is 1932100411.

It is not a de Polignac number, because 1140012391 - 2¹⁵ = 1139979623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140012371) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1533966 + ... + 1534708.

It is an arithmetic number, because the mean of its divisors is an integer number (55957356).

Almost surely, 2^1140012391 is an apocalyptic number.

1140012391 is a deficient number, since it is larger than the sum of its proper divisors (202964153).

1140012391 is a wasteful number, since it uses less digits than its factorization.

1140012391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111 (or 1104 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 1140012391 is about 33764.0695266433. The cubic root of 1140012391 is about 1044.6477116574.

The spelling of 1140012391 in words is "one billion, one hundred forty million, twelve thousand, three hundred ninety-one".