1380656 has 10 divisors (see below), whose sum is σ = 2675052. Its totient is φ = 690320.

The previous prime is 1380653. The next prime is 1380671. The reversal of 1380656 is 6560831.

It is not an unprimeable number, because it can be changed into a prime (1380653) 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, 43130 + ... + 43161.

2^1380656 is an apocalyptic number.

1380656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1380656 is a deficient number, since it is larger than the sum of its proper divisors (1294396).

1380656 is an equidigital number, since it uses as much as digits as its factorization.

1380656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86299 (or 86293 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1380656 is about 1175.0131914153. The cubic root of 1380656 is about 111.3512666280.

The spelling of 1380656 in words is "one million, three hundred eighty thousand, six hundred fifty-six".