1287147120 has 160 divisors (see below), whose sum is σ = 4683652608. Its totient is φ = 286239744.

The previous prime is 1287147097. The next prime is 1287147227. The reversal of 1287147120 is 217417821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51807 + ... + 72513.

Almost surely, 2^1287147120 is an apocalyptic number.

1287147120 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 1287147120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2341826304).

1287147120 is an abundant number, since it is smaller than the sum of its proper divisors (3396505488).

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

1287147120 is a wasteful number, since it uses less digits than its factorization.

1287147120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20767 (or 20761 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 33.

The square root of 1287147120 is about 35876.8326361177. The cubic root of 1287147120 is about 1087.7841582718.

The spelling of 1287147120 in words is "one billion, two hundred eighty-seven million, one hundred forty-seven thousand, one hundred twenty".