1251115255 has 32 divisors (see below), whose sum is σ = 1716120000. Its totient is φ = 867428352.

The previous prime is 1251115253. The next prime is 1251115277. The reversal of 1251115255 is 5525111521.

It is a cyclic number.

It is not a de Polignac number, because 1251115255 - 2¹ = 1251115253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251115253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 550261 + ... + 552529.

It is an arithmetic number, because the mean of its divisors is an integer number (53628750).

Almost surely, 2^1251115255 is an apocalyptic number.

1251115255 is a deficient number, since it is larger than the sum of its proper divisors (465004745).

1251115255 is a wasteful number, since it uses less digits than its factorization.

1251115255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2803.

The product of its digits is 2500, while the sum is 28.

The square root of 1251115255 is about 35371.1076303810. The cubic root of 1251115255 is about 1077.5376156606.

Adding to 1251115255 its reverse (5525111521), we get a palindrome (6776226776).

The spelling of 1251115255 in words is "one billion, two hundred fifty-one million, one hundred fifteen thousand, two hundred fifty-five".