1381456 has 10 divisors (see below), whose sum is σ = 2676602. Its totient is φ = 690720.

The previous prime is 1381451. The next prime is 1381459. The reversal of 1381456 is 6541831.

1381456 is nontrivially palindromic in base 15.

It can be written as a sum of positive squares in only one way, i.e., 1040400 + 341056 = 1020^2 + 584^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43155 + ... + 43186.

2^1381456 is an apocalyptic number.

1381456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1381456 is a deficient number, since it is larger than the sum of its proper divisors (1295146).

1381456 is an equidigital number, since it uses as much as digits as its factorization.

1381456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86349 (or 86343 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 1381456 is about 1175.3535638266. The cubic root of 1381456 is about 111.3727694048.

The spelling of 1381456 in words is "one million, three hundred eighty-one thousand, four hundred fifty-six".