1380256 has 12 divisors (see below), whose sum is σ = 2717442. Its totient is φ = 690112.

The previous prime is 1380251. The next prime is 1380259. The reversal of 1380256 is 6520831.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1299600 + 80656 = 1140^2 + 284^2 .

It is a zygodrome in base 4.

It is a self number, because there is not a number n which added to its sum of digits gives 1380256.

It is not an unprimeable number, because it can be changed into a prime (1380251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21535 + ... + 21598.

2^1380256 is an apocalyptic number.

1380256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1380256 is a deficient number, since it is larger than the sum of its proper divisors (1337186).

1380256 is an equidigital number, since it uses as much as digits as its factorization.

1380256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43143 (or 43135 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1380256 is about 1174.8429682302. The cubic root of 1380256 is about 111.3405121247.

The spelling of 1380256 in words is "one million, three hundred eighty thousand, two hundred fifty-six".