1255105623 has 4 divisors (see below), whose sum is σ = 1673474168. Its totient is φ = 836737080.

The previous prime is 1255105619. The next prime is 1255105633. The reversal of 1255105623 is 3265015521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3265015521 = 3 ⋅1088338507.

It is not a de Polignac number, because 1255105623 - 2² = 1255105619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255105633) 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 3 ways as a sum of consecutive naturals, for example, 209184268 + ... + 209184273.

It is an arithmetic number, because the mean of its divisors is an integer number (418368542).

Almost surely, 2^1255105623 is an apocalyptic number.

1255105623 is a deficient number, since it is larger than the sum of its proper divisors (418368545).

1255105623 is an equidigital number, since it uses as much as digits as its factorization.

1255105623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418368544.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 1255105623 is about 35427.4698927259. The cubic root of 1255105623 is about 1078.6819835584.

The spelling of 1255105623 in words is "one billion, two hundred fifty-five million, one hundred five thousand, six hundred twenty-three".