1145640256 has 28 divisors (see below), whose sum is σ = 2274455700. Its totient is φ = 572549120.

The previous prime is 1145640253. The next prime is 1145640277. The reversal of 1145640256 is 6520465411.

It can be written as a sum of positive squares in 2 ways, for example, as 625800256 + 519840000 = 25016^2 + 22800^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145640253) 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, 256926 + ... + 261346.

Almost surely, 2^1145640256 is an apocalyptic number.

1145640256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1145640256 is a deficient number, since it is larger than the sum of its proper divisors (1128815444).

1145640256 is an equidigital number, since it uses as much as digits as its factorization.

1145640256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8482 (or 8472 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 1145640256 is about 33847.3079579455. The cubic root of 1145640256 is about 1046.3639176490.

The spelling of 1145640256 in words is "one billion, one hundred forty-five million, six hundred forty thousand, two hundred fifty-six".