1382905 has 4 divisors (see below), whose sum is σ = 1659492. Its totient is φ = 1106320.

The previous prime is 1382893. The next prime is 1382939. The reversal of 1382905 is 5092831.

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 622521 + 760384 = 789^2 + 872^2 .

It is not a de Polignac number, because 1382905 - 2⁹ = 1382393 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138286 + ... + 138295.

It is an arithmetic number, because the mean of its divisors is an integer number (414873).

2^1382905 is an apocalyptic number.

It is an amenable number.

1382905 is a deficient number, since it is larger than the sum of its proper divisors (276587).

1382905 is an equidigital number, since it uses as much as digits as its factorization.

1382905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276586.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1382905 is about 1175.9698125377. The cubic root of 1382905 is about 111.4116951837.

The spelling of 1382905 in words is "one million, three hundred eighty-two thousand, nine hundred five".