1140212291 has 4 divisors (see below), whose sum is σ = 1140521952. Its totient is φ = 1139902632.

The previous prime is 1140212273. The next prime is 1140212299. The reversal of 1140212291 is 1922120411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1140212291 - 2¹⁴ = 1140195907 is a prime.

It is a super-3 number, since 3×1140212291³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1140212299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149240 + ... + 156693.

It is an arithmetic number, because the mean of its divisors is an integer number (285130488).

Almost surely, 2^1140212291 is an apocalyptic number.

1140212291 is a deficient number, since it is larger than the sum of its proper divisors (309661).

1140212291 is an equidigital number, since it uses as much as digits as its factorization.

1140212291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309660.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 1140212291 is about 33767.0296443143. The cubic root of 1140212291 is about 1044.7087673894.

The spelling of 1140212291 in words is "one billion, one hundred forty million, two hundred twelve thousand, two hundred ninety-one".