1287395 has 8 divisors (see below), whose sum is σ = 1553904. Its totient is φ = 1023904.

The previous prime is 1287373. The next prime is 1287401. The reversal of 1287395 is 5937821.

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 1287395 - 2¹⁰ = 1286371 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

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, 332 + ... + 1638.

It is an arithmetic number, because the mean of its divisors is an integer number (194238).

2^1287395 is an apocalyptic number.

1287395 is a deficient number, since it is larger than the sum of its proper divisors (266509).

1287395 is a wasteful number, since it uses less digits than its factorization.

1287395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509.

The product of its digits is 15120, while the sum is 35.

The square root of 1287395 is about 1134.6343023195. The cubic root of 1287395 is about 108.7853982621.

The spelling of 1287395 in words is "one million, two hundred eighty-seven thousand, three hundred ninety-five".