1393885 has 8 divisors (see below), whose sum is σ = 1730520. Its totient is φ = 1076544.

The previous prime is 1393883. The next prime is 1393891. The reversal of 1393885 is 5883931.

It can be written as a sum of positive squares in 4 ways, for example, as 573049 + 820836 = 757^2 + 906^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1393885 - 2¹ = 1393883 is a prime.

It is an Ulam number.

1393885 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1393883) 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 7 ways as a sum of consecutive naturals, for example, 4662 + ... + 4951.

It is an arithmetic number, because the mean of its divisors is an integer number (216315).

2^1393885 is an apocalyptic number.

It is an amenable number.

1393885 is a deficient number, since it is larger than the sum of its proper divisors (336635).

1393885 is an equidigital number, since it uses as much as digits as its factorization.

1393885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9647.

The product of its digits is 25920, while the sum is 37.

The square root of 1393885 is about 1180.6290696065. The cubic root of 1393885 is about 111.7057807088.

It can be divided in two parts, 1393 and 885, that added together give a triangular number (2278 = T₆₇).

The spelling of 1393885 in words is "one million, three hundred ninety-three thousand, eight hundred eighty-five".