1398256 has 20 divisors (see below), whose sum is σ = 2727504. Its totient is φ = 694400.

The previous prime is 1398251. The next prime is 1398259. The reversal of 1398256 is 6528931.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398251) 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 3 ways as a sum of consecutive naturals, for example, 4341 + ... + 4651.

2^1398256 is an apocalyptic number.

1398256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1398256 is a deficient number, since it is larger than the sum of its proper divisors (1329248).

1398256 is a wasteful number, since it uses less digits than its factorization.

1398256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600 (or 594 counting only the distinct ones).

The product of its digits is 12960, while the sum is 34.

The square root of 1398256 is about 1182.4787524518. The cubic root of 1398256 is about 111.8224226795.

The spelling of 1398256 in words is "one million, three hundred ninety-eight thousand, two hundred fifty-six".