1255133905 has 8 divisors (see below), whose sum is σ = 1507046184. Its totient is φ = 1003516800.

The previous prime is 1255133903. The next prime is 1255133911. The reversal of 1255133905 is 5093315521.

It can be written as a sum of positive squares in 4 ways, for example, as 80838081 + 1174295824 = 8991^2 + 34268^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1255133905 - 2¹ = 1255133903 is a prime.

It is a super-2 number, since 2×1255133905² = 3150722238961098050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1255133903) 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 7 ways as a sum of consecutive naturals, for example, 64326 + ... + 81535.

It is an arithmetic number, because the mean of its divisors is an integer number (188380773).

Almost surely, 2^1255133905 is an apocalyptic number.

It is an amenable number.

1255133905 is a deficient number, since it is larger than the sum of its proper divisors (251912279).

1255133905 is a wasteful number, since it uses less digits than its factorization.

1255133905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147587.

The product of its (nonzero) digits is 20250, while the sum is 34.

The square root of 1255133905 is about 35427.8690440167. The cubic root of 1255133905 is about 1078.6900856799.

The spelling of 1255133905 in words is "one billion, two hundred fifty-five million, one hundred thirty-three thousand, nine hundred five".