1140356857 has 4 divisors (see below), whose sum is σ = 1143643536. Its totient is φ = 1137070180.

The previous prime is 1140356849. The next prime is 1140356873. The reversal of 1140356857 is 7586530411.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1140356857 - 2³ = 1140356849 is a prime.

It is a super-2 number, since 2×1140356857² = 2600827522613836898, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1140356827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1642819 + ... + 1643512.

It is an arithmetic number, because the mean of its divisors is an integer number (285910884).

Almost surely, 2^1140356857 is an apocalyptic number.

It is an amenable number.

1140356857 is a deficient number, since it is larger than the sum of its proper divisors (3286679).

1140356857 is an equidigital number, since it uses as much as digits as its factorization.

1140356857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3286678.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 1140356857 is about 33769.1702148572. The cubic root of 1140356857 is about 1044.7529179353.

The spelling of 1140356857 in words is "one billion, one hundred forty million, three hundred fifty-six thousand, eight hundred fifty-seven".