1287073 has 4 divisors (see below), whose sum is σ = 1290240. Its totient is φ = 1283908.

The previous prime is 1287071. The next prime is 1287101. The reversal of 1287073 is 3707821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1287073 - 2¹ = 1287071 is a prime.

It is a Duffinian number.

1287073 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1287071) 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, 865 + ... + 1822.

It is an arithmetic number, because the mean of its divisors is an integer number (322560).

2^1287073 is an apocalyptic number.

It is an amenable number.

1287073 is a deficient number, since it is larger than the sum of its proper divisors (3167).

1287073 is an equidigital number, since it uses as much as digits as its factorization.

1287073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3166.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 1287073 is about 1134.4923975065. The cubic root of 1287073 is about 108.7763277957.

The spelling of 1287073 in words is "one million, two hundred eighty-seven thousand, seventy-three".