1380555 has 24 divisors (see below), whose sum is σ = 2611440. Its totient is φ = 669120.

The previous prime is 1380551. The next prime is 1380557. The reversal of 1380555 is 5550831.

It is not a de Polignac number, because 1380555 - 2² = 1380551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1380551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 900 + ... + 1889.

It is an arithmetic number, because the mean of its divisors is an integer number (108810).

2^1380555 is an apocalyptic number.

1380555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1380555 is a deficient number, since it is larger than the sum of its proper divisors (1230885).

1380555 is a wasteful number, since it uses less digits than its factorization.

1380555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2811 (or 2808 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 1380555 is about 1174.9702123884. The cubic root of 1380555 is about 111.3485513120.

The spelling of 1380555 in words is "one million, three hundred eighty thousand, five hundred fifty-five".