1255123266 has 16 divisors (see below), whose sum is σ = 2523391488. Its totient is φ = 416183600.

The previous prime is 1255123229. The next prime is 1255123273. The reversal of 1255123266 is 6623215521.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 546465 + ... + 548756.

It is an arithmetic number, because the mean of its divisors is an integer number (157711968).

Almost surely, 2^1255123266 is an apocalyptic number.

1255123266 is an abundant number, since it is smaller than the sum of its proper divisors (1268268222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1255123266 is a wasteful number, since it uses less digits than its factorization.

1255123266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095417.

The product of its digits is 21600, while the sum is 33.

The square root of 1255123266 is about 35427.7188935444. The cubic root of 1255123266 is about 1078.6870378732.

Adding to 1255123266 its reverse (6623215521), we get a palindrome (7878338787).

It can be divided in two parts, 125512 and 3266, that added together give a triangular number (128778 = T₅₀₇).

The spelling of 1255123266 in words is "one billion, two hundred fifty-five million, one hundred twenty-three thousand, two hundred sixty-six".