1140256387 has 2 divisors, whose sum is σ = 1140256388. Its totient is φ = 1140256386.

The previous prime is 1140256297. The next prime is 1140256391. The reversal of 1140256387 is 7836520411.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1140256387 - 2²⁷ = 1006038659 is a prime.

It is not a weakly prime, because it can be changed into another prime (1140250387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 570128193 + 570128194.

It is an arithmetic number, because the mean of its divisors is an integer number (570128194).

Almost surely, 2^1140256387 is an apocalyptic number.

1140256387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1140256387 is an equidigital number, since it uses as much as digits as its factorization.

1140256387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 1140256387 is about 33767.6825826114. The cubic root of 1140256387 is about 1044.7222347306.

Adding to 1140256387 its reverse (7836520411), we get a palindrome (8976776798).

The spelling of 1140256387 in words is "one billion, one hundred forty million, two hundred fifty-six thousand, three hundred eighty-seven".