1287013 has 8 divisors (see below), whose sum is σ = 1584128. Its totient is φ = 1018224.

The previous prime is 1287007. The next prime is 1287047. The reversal of 1287013 is 3107821.

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

It is a cyclic number.

It is not a de Polignac number, because 1287013 - 2⁵ = 1286981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6981 + ... + 7162.

It is an arithmetic number, because the mean of its divisors is an integer number (198016).

2^1287013 is an apocalyptic number.

1287013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1287013 is a deficient number, since it is larger than the sum of its proper divisors (297115).

1287013 is a wasteful number, since it uses less digits than its factorization.

1287013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14163.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1287013 is about 1134.4659536540. The cubic root of 1287013 is about 108.7746374795.

It can be divided in two parts, 12 and 87013, that added together give a square (87025 = 295²).

The spelling of 1287013 in words is "one million, two hundred eighty-seven thousand, thirteen".