1256114243 has 4 divisors (see below), whose sum is σ = 1256226048. Its totient is φ = 1256002440.

The previous prime is 1256114239. The next prime is 1256114269. The reversal of 1256114243 is 3424116521.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1256114243 - 2² = 1256114239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1256114143) 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, 36896 + ... + 62237.

It is an arithmetic number, because the mean of its divisors is an integer number (314056512).

Almost surely, 2^1256114243 is an apocalyptic number.

1256114243 is a deficient number, since it is larger than the sum of its proper divisors (111805).

1256114243 is an equidigital number, since it uses as much as digits as its factorization.

1256114243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111804.

The product of its digits is 5760, while the sum is 29.

The square root of 1256114243 is about 35441.7020330570. The cubic root of 1256114243 is about 1078.9708540443.

The spelling of 1256114243 in words is "one billion, two hundred fifty-six million, one hundred fourteen thousand, two hundred forty-three".