1255011115 has 32 divisors (see below), whose sum is σ = 1580078016. Its totient is φ = 956067840.

The previous prime is 1255011113. The next prime is 1255011119. The reversal of 1255011115 is 5111105521.

It is not a de Polignac number, because 1255011115 - 2¹ = 1255011113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1255011113) 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, 2745967 + ... + 2746423.

It is an arithmetic number, because the mean of its divisors is an integer number (49377438).

Almost surely, 2^1255011115 is an apocalyptic number.

1255011115 is a deficient number, since it is larger than the sum of its proper divisors (325066901).

1255011115 is a wasteful number, since it uses less digits than its factorization.

1255011115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799.

The product of its (nonzero) digits is 250, while the sum is 22.

The square root of 1255011115 is about 35426.1360438871. The cubic root of 1255011115 is about 1078.6549083774.

Adding to 1255011115 its reverse (5111105521), we get a palindrome (6366116636).

The spelling of 1255011115 in words is "one billion, two hundred fifty-five million, eleven thousand, one hundred fifteen".