1083140257 has 4 divisors (see below), whose sum is σ = 1112414356. Its totient is φ = 1053866160.

The previous prime is 1083140251. The next prime is 1083140263. The reversal of 1083140257 is 7520413801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7520413801 = 2609 ⋅2882489.

It is an interprime number because it is at equal distance from previous prime (1083140251) and next prime (1083140263).

It can be written as a sum of positive squares in 2 ways, for example, as 577969681 + 505170576 = 24041^2 + 22476^2 .

It is a cyclic number.

It is not a de Polignac number, because 1083140257 - 2³ = 1083140249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1083140251) 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, 14636994 + ... + 14637067.

It is an arithmetic number, because the mean of its divisors is an integer number (278103589).

Almost surely, 2^1083140257 is an apocalyptic number.

It is an amenable number.

1083140257 is a deficient number, since it is larger than the sum of its proper divisors (29274099).

1083140257 is an equidigital number, since it uses as much as digits as its factorization.

1083140257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29274098.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 1083140257 is about 32911.0962594685. The cubic root of 1083140257 is about 1026.9790065006.

The spelling of 1083140257 in words is "one billion, eighty-three million, one hundred forty thousand, two hundred fifty-seven".