1288211172 has 36 divisors (see below), whose sum is σ = 3172364496. Its totient is φ = 406802160.

The previous prime is 1288211161. The next prime is 1288211173. The reversal of 1288211172 is 2711128821.

It is a happy number.

It is a super-2 number, since 2×1288211172² = 3318976047331227168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1288211173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 144354 + ... + 153017.

It is an arithmetic number, because the mean of its divisors is an integer number (88121236).

Almost surely, 2^1288211172 is an apocalyptic number.

1288211172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1288211172 is an abundant number, since it is smaller than the sum of its proper divisors (1884153324).

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

1288211172 is a wasteful number, since it uses less digits than its factorization.

1288211172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297416 (or 297395 counting only the distinct ones).

The product of its digits is 3584, while the sum is 33.

The square root of 1288211172 is about 35891.6588081409. The cubic root of 1288211172 is about 1088.0838236041.

Adding to 1288211172 its reverse (2711128821), we get a palindrome (3999339993).

The spelling of 1288211172 in words is "one billion, two hundred eighty-eight million, two hundred eleven thousand, one hundred seventy-two".