1380345 has 16 divisors (see below), whose sum is σ = 2305152. Its totient is φ = 704000.

The previous prime is 1380341. The next prime is 1380377. The reversal of 1380345 is 5430831.

It is not a de Polignac number, because 1380345 - 2² = 1380341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1380341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1656 + ... + 2345.

It is an arithmetic number, because the mean of its divisors is an integer number (144072).

2^1380345 is an apocalyptic number.

1380345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1380345 is a deficient number, since it is larger than the sum of its proper divisors (924807).

1380345 is a wasteful number, since it uses less digits than its factorization.

1380345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4032.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1380345 is about 1174.8808450222. The cubic root of 1380345 is about 111.3429051814.

It can be divided in two parts, 1380 and 345, that multiplied together give a square (476100 = 690²).

The spelling of 1380345 in words is "one million, three hundred eighty thousand, three hundred forty-five".