1255516126 has 8 divisors (see below), whose sum is σ = 1895270040. Its totient is φ = 623759448.

The previous prime is 1255516121. The next prime is 1255516127. The reversal of 1255516126 is 6216155521.

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

It is a junction number, because it is equal to n+sod(n) for n = 1255516091 and 1255516100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255516121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1998916 + ... + 1999543.

It is an arithmetic number, because the mean of its divisors is an integer number (236908755).

Almost surely, 2^1255516126 is an apocalyptic number.

1255516126 is a deficient number, since it is larger than the sum of its proper divisors (639753914).

1255516126 is a wasteful number, since it uses less digits than its factorization.

1255516126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3998618.

The product of its digits is 18000, while the sum is 34.

The square root of 1255516126 is about 35433.2629883278. The cubic root of 1255516126 is about 1078.7995709857.

The spelling of 1255516126 in words is "one billion, two hundred fifty-five million, five hundred sixteen thousand, one hundred twenty-six".