1255612243 has 4 divisors (see below), whose sum is σ = 1258129000. Its totient is φ = 1253095488.

The previous prime is 1255612229. The next prime is 1255612271. The reversal of 1255612243 is 3422165521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3422165521 = 2099 ⋅1630379.

It is a cyclic number.

It is not a de Polignac number, because 1255612243 - 2²¹ = 1253515091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1255612543) 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, 1257630 + ... + 1258627.

It is an arithmetic number, because the mean of its divisors is an integer number (314532250).

Almost surely, 2^1255612243 is an apocalyptic number.

1255612243 is a deficient number, since it is larger than the sum of its proper divisors (2516757).

1255612243 is an equidigital number, since it uses as much as digits as its factorization.

1255612243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2516756.

The product of its digits is 14400, while the sum is 31.

The square root of 1255612243 is about 35434.6192726830. The cubic root of 1255612243 is about 1078.8270997261.

Adding to 1255612243 its reverse (3422165521), we get a palindrome (4677777764).

The spelling of 1255612243 in words is "one billion, two hundred fifty-five million, six hundred twelve thousand, two hundred forty-three".