1255389123 has 12 divisors (see below), whose sum is σ = 1778107160. Its totient is φ = 787694592.

The previous prime is 1255389119. The next prime is 1255389133. The reversal of 1255389123 is 3219835521.

It is not a de Polignac number, because 1255389123 - 2² = 1255389119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1255389133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 723118 + ... + 724851.

Almost surely, 2^1255389123 is an apocalyptic number.

1255389123 is a deficient number, since it is larger than the sum of its proper divisors (522718037).

1255389123 is a wasteful number, since it uses less digits than its factorization.

1255389123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448006 (or 1447989 counting only the distinct ones).

The product of its digits is 64800, while the sum is 39.

The square root of 1255389123 is about 35431.4707992767. The cubic root of 1255389123 is about 1078.7631940729.

The spelling of 1255389123 in words is "one billion, two hundred fifty-five million, three hundred eighty-nine thousand, one hundred twenty-three".