1287293 has 8 divisors (see below), whose sum is σ = 1481088. Its totient is φ = 1095984.

The previous prime is 1287289. The next prime is 1287323. The reversal of 1287293 is 3927821.

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 1287293 - 2² = 1287289 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 680 + ... + 1742.

It is an arithmetic number, because the mean of its divisors is an integer number (185136).

2^1287293 is an apocalyptic number.

It is an amenable number.

1287293 is a deficient number, since it is larger than the sum of its proper divisors (193795).

1287293 is a wasteful number, since it uses less digits than its factorization.

1287293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243.

The product of its digits is 6048, while the sum is 32.

The square root of 1287293 is about 1134.5893530260. The cubic root of 1287293 is about 108.7825251725.

The spelling of 1287293 in words is "one million, two hundred eighty-seven thousand, two hundred ninety-three".