1287118080 has 144 divisors (see below), whose sum is σ = 4567604160. Its totient is φ = 343222272.

The previous prime is 1287118061. The next prime is 1287118081. The reversal of 1287118080 is 808117821.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287118081) 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, 15939 + ... + 53181.

Almost surely, 2^1287118080 is an apocalyptic number.

1287118080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1287118080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2283802080).

1287118080 is an abundant number, since it is smaller than the sum of its proper divisors (3280486080).

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

1287118080 is an equidigital number, since it uses as much as digits as its factorization.

1287118080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37273 (or 37253 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 36.

The square root of 1287118080 is about 35876.4279158335. The cubic root of 1287118080 is about 1087.7759775210.

The spelling of 1287118080 in words is "one billion, two hundred eighty-seven million, one hundred eighteen thousand, eighty".