1287288687 has 16 divisors (see below), whose sum is σ = 1764099072. Its totient is φ = 834568800.

The previous prime is 1287288683. The next prime is 1287288697. The reversal of 1287288687 is 7868827821.

It is not a de Polignac number, because 1287288687 - 2² = 1287288683 is a prime.

It is a super-2 number, since 2×1287288687² = 3314224327356367938, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287288683) 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, 6939 + ... + 51212.

It is an arithmetic number, because the mean of its divisors is an integer number (110256192).

Almost surely, 2^1287288687 is an apocalyptic number.

1287288687 is a deficient number, since it is larger than the sum of its proper divisors (476810385).

1287288687 is a wasteful number, since it uses less digits than its factorization.

1287288687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58358.

The product of its digits is 4816896, while the sum is 57.

The square root of 1287288687 is about 35878.8055403186. The cubic root of 1287288687 is about 1087.8240368250.

The spelling of 1287288687 in words is "one billion, two hundred eighty-seven million, two hundred eighty-eight thousand, six hundred eighty-seven".