1255125543 has 12 divisors (see below), whose sum is σ = 1946725560. Its totient is φ = 717214512.

The previous prime is 1255125533. The next prime is 1255125577. The reversal of 1255125543 is 3455215521.

It is not a de Polignac number, because 1255125543 - 2⁴ = 1255125527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255125533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4268988 + ... + 4269281.

It is an arithmetic number, because the mean of its divisors is an integer number (162227130).

Almost surely, 2^1255125543 is an apocalyptic number.

1255125543 is a deficient number, since it is larger than the sum of its proper divisors (691600017).

1255125543 is an equidigital number, since it uses as much as digits as its factorization.

1255125543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8538286 (or 8538279 counting only the distinct ones).

The product of its digits is 30000, while the sum is 33.

The square root of 1255125543 is about 35427.7510293837. The cubic root of 1255125543 is about 1078.6876901781.

The spelling of 1255125543 in words is "one billion, two hundred fifty-five million, one hundred twenty-five thousand, five hundred forty-three".