1287082043 has 4 divisors (see below), whose sum is σ = 1386088368. Its totient is φ = 1188075720.

The previous prime is 1287082033. The next prime is 1287082099. The reversal of 1287082043 is 3402807821.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1287082043 - 2⁸ = 1287081787 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1287081994 and 1287082012.

It is not an unprimeable number, because it can be changed into a prime (1287082033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49503143 + ... + 49503168.

It is an arithmetic number, because the mean of its divisors is an integer number (346522092).

Almost surely, 2^1287082043 is an apocalyptic number.

1287082043 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1287082043 is a deficient number, since it is larger than the sum of its proper divisors (99006325).

1287082043 is an equidigital number, since it uses as much as digits as its factorization.

1287082043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99006324.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 1287082043 is about 35875.9256744687. The cubic root of 1287082043 is about 1087.7658255002.

Adding to 1287082043 its reverse (3402807821), we get a palindrome (4689889864).

The spelling of 1287082043 in words is "one billion, two hundred eighty-seven million, eighty-two thousand, forty-three".