1398287 has 8 divisors (see below), whose sum is σ = 1534032. Its totient is φ = 1264000.

The previous prime is 1398283. The next prime is 1398289. The reversal of 1398287 is 7828931.

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 1398287 - 2² = 1398283 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1398287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398281) 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, 3287 + ... + 3687.

It is an arithmetic number, because the mean of its divisors is an integer number (191754).

2^1398287 is an apocalyptic number.

1398287 is a deficient number, since it is larger than the sum of its proper divisors (135745).

1398287 is a wasteful number, since it uses less digits than its factorization.

1398287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729.

The product of its digits is 24192, while the sum is 38.

The square root of 1398287 is about 1182.4918604371. The cubic root of 1398287 is about 111.8232490588.

The spelling of 1398287 in words is "one million, three hundred ninety-eight thousand, two hundred eighty-seven".