1287158 has 8 divisors (see below), whose sum is σ = 1967328. Its totient is φ = 631384.

The previous prime is 1287157. The next prime is 1287163. The reversal of 1287158 is 8517821.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287157) 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 3 ways as a sum of consecutive naturals, for example, 5966 + ... + 6177.

It is an arithmetic number, because the mean of its divisors is an integer number (245916).

2^1287158 is an apocalyptic number.

1287158 is a deficient number, since it is larger than the sum of its proper divisors (680170).

1287158 is a wasteful number, since it uses less digits than its factorization.

1287158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12198.

The product of its digits is 4480, while the sum is 32.

The square root of 1287158 is about 1134.5298585758. The cubic root of 1287158 is about 108.7787223205.

The spelling of 1287158 in words is "one million, two hundred eighty-seven thousand, one hundred fifty-eight".