1380829 has 4 divisors (see below), whose sum is σ = 1383580. Its totient is φ = 1378080.

The previous prime is 1380817. The next prime is 1380853. The reversal of 1380829 is 9280831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1159929 + 220900 = 1077^2 + 470^2 .

It is a cyclic number.

It is not a de Polignac number, because 1380829 - 2⁹ = 1380317 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1380829.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 384 + ... + 1705.

It is an arithmetic number, because the mean of its divisors is an integer number (345895).

2^1380829 is an apocalyptic number.

It is an amenable number.

1380829 is a deficient number, since it is larger than the sum of its proper divisors (2751).

1380829 is an equidigital number, since it uses as much as digits as its factorization.

1380829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2750.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 1380829 is about 1175.0868053042. The cubic root of 1380829 is about 111.3559173073.

It can be divided in two parts, 1380 and 829, that added together give a square (2209 = 47²).

The spelling of 1380829 in words is "one million, three hundred eighty thousand, eight hundred twenty-nine".