1140291 has 16 divisors (see below), whose sum is σ = 1706400. Its totient is φ = 752544.

The previous prime is 1140289. The next prime is 1140311. The reversal of 1140291 is 1920411.

It is not a de Polignac number, because 1140291 - 2¹ = 1140289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1140281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4105 + ... + 4373.

It is an arithmetic number, because the mean of its divisors is an integer number (106650).

2^1140291 is an apocalyptic number.

1140291 is a deficient number, since it is larger than the sum of its proper divisors (566109).

1140291 is a wasteful number, since it uses less digits than its factorization.

1140291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1140291 is about 1067.8440897434. The cubic root of 1140291 is about 104.4732805629.

It can be divided in two parts, 1140 and 291, that added together give a triangular number (1431 = T₅₃).

The spelling of 1140291 in words is "one million, one hundred forty thousand, two hundred ninety-one".