1288161111 has 16 divisors (see below), whose sum is σ = 1819304928. Its totient is φ = 807936000.

The previous prime is 1288161103. The next prime is 1288161137. The reversal of 1288161111 is 1111618821.

It is not a de Polignac number, because 1288161111 - 2³ = 1288161103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288161151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242221 + ... + 247481.

It is an arithmetic number, because the mean of its divisors is an integer number (113706558).

Almost surely, 2^1288161111 is an apocalyptic number.

1288161111 is a deficient number, since it is larger than the sum of its proper divisors (531143817).

1288161111 is a wasteful number, since it uses less digits than its factorization.

1288161111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10082.

The product of its digits is 768, while the sum is 30.

The square root of 1288161111 is about 35890.9614109179. The cubic root of 1288161111 is about 1088.0697287955.

Adding to 1288161111 its reverse (1111618821), we get a palindrome (2399779932).

The spelling of 1288161111 in words is "one billion, two hundred eighty-eight million, one hundred sixty-one thousand, one hundred eleven".