1255435123 has 4 divisors (see below), whose sum is σ = 1289365840. Its totient is φ = 1221504408.

The previous prime is 1255435121. The next prime is 1255435141. The reversal of 1255435123 is 3215345521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1255435123 - 2¹ = 1255435121 is a prime.

It is a super-2 number, since 2×1255435123² = 3152234696124050258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1255435121) 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, 16965303 + ... + 16965376.

It is an arithmetic number, because the mean of its divisors is an integer number (322341460).

Almost surely, 2^1255435123 is an apocalyptic number.

1255435123 is a deficient number, since it is larger than the sum of its proper divisors (33930717).

1255435123 is an equidigital number, since it uses as much as digits as its factorization.

1255435123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33930716.

The product of its digits is 18000, while the sum is 31.

The square root of 1255435123 is about 35432.1199337550. The cubic root of 1255435123 is about 1078.7763699347.

The spelling of 1255435123 in words is "one billion, two hundred fifty-five million, four hundred thirty-five thousand, one hundred twenty-three".