1140256217 has 8 divisors (see below), whose sum is σ = 1155302400. Its totient is φ = 1125225504.

The previous prime is 1140256213. The next prime is 1140256223. The reversal of 1140256217 is 7126520411.

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

It is a cyclic number.

It is not a de Polignac number, because 1140256217 - 2² = 1140256213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1140256217.

It is not an unprimeable number, because it can be changed into a prime (1140256213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263213 + ... + 267509.

It is an arithmetic number, because the mean of its divisors is an integer number (144412800).

Almost surely, 2^1140256217 is an apocalyptic number.

It is an amenable number.

1140256217 is a deficient number, since it is larger than the sum of its proper divisors (15046183).

1140256217 is an equidigital number, since it uses as much as digits as its factorization.

1140256217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7735.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 1140256217 is about 33767.6800654117. The cubic root of 1140256217 is about 1044.7221828116.

Adding to 1140256217 its reverse (7126520411), we get a palindrome (8266776628).

The spelling of 1140256217 in words is "one billion, one hundred forty million, two hundred fifty-six thousand, two hundred seventeen".