1287870513 has 8 divisors (see below), whose sum is σ = 1818170208. Its totient is φ = 808075584.

The previous prime is 1287870509. The next prime is 1287870523. The reversal of 1287870513 is 3150787821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1287870513 - 2² = 1287870509 is a prime.

It is a super-2 number, since 2×1287870513² = 3317220916509766338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1287870503) 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 7 ways as a sum of consecutive naturals, for example, 12626131 + ... + 12626232.

It is an arithmetic number, because the mean of its divisors is an integer number (227271276).

Almost surely, 2^1287870513 is an apocalyptic number.

It is an amenable number.

1287870513 is a deficient number, since it is larger than the sum of its proper divisors (530299695).

1287870513 is a wasteful number, since it uses less digits than its factorization.

1287870513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25252383.

The product of its (nonzero) digits is 94080, while the sum is 42.

The square root of 1287870513 is about 35886.9128374119. The cubic root of 1287870513 is about 1087.9879029369.

The spelling of 1287870513 in words is "one billion, two hundred eighty-seven million, eight hundred seventy thousand, five hundred thirteen".