1399456 has 24 divisors (see below), whose sum is σ = 2788884. Its totient is φ = 691200.

The previous prime is 1399441. The next prime is 1399469. The reversal of 1399456 is 6549931.

1399456 is nontrivially palindromic in base 15.

It can be written as a sum of positive squares in 2 ways, for example, as 1392400 + 7056 = 1180^2 + 84^2 .

It is an Ulam number.

It is a zygodrome in base 4.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3016 + ... + 3448.

2^1399456 is an apocalyptic number.

1399456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1399456 is a deficient number, since it is larger than the sum of its proper divisors (1389428).

1399456 is a wasteful number, since it uses less digits than its factorization.

1399456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544 (or 536 counting only the distinct ones).

The product of its digits is 29160, while the sum is 37.

The square root of 1399456 is about 1182.9860523269. The cubic root of 1399456 is about 111.8544026456.

The spelling of 1399456 in words is "one million, three hundred ninety-nine thousand, four hundred fifty-six".