1287801130 has 32 divisors (see below), whose sum is σ = 2890028160. Its totient is φ = 401392320.

The previous prime is 1287801121. The next prime is 1287801149. The reversal of 1287801130 is 311087821.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1287801092 and 1287801101.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 835465 + ... + 837004.

It is an arithmetic number, because the mean of its divisors is an integer number (90313380).

Almost surely, 2^1287801130 is an apocalyptic number.

1287801130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1287801130 is an abundant number, since it is smaller than the sum of its proper divisors (1602227030).

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

1287801130 is a wasteful number, since it uses less digits than its factorization.

1287801130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672494.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 1287801130 is about 35885.9461349426. The cubic root of 1287801130 is about 1087.9683644249.

Adding to 1287801130 its reverse (311087821), we get a palindrome (1598888951).

The spelling of 1287801130 in words is "one billion, two hundred eighty-seven million, eight hundred one thousand, one hundred thirty".