1391085 has 24 divisors (see below), whose sum is σ = 2539680. Its totient is φ = 702432.

The previous prime is 1391083. The next prime is 1391087. The reversal of 1391085 is 5801931.

It is an interprime number because it is at equal distance from previous prime (1391083) and next prime (1391087).

It is not a de Polignac number, because 1391085 - 2¹ = 1391083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391081) 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 23 ways as a sum of consecutive naturals, for example, 42 + ... + 1668.

It is an arithmetic number, because the mean of its divisors is an integer number (105820).

2^1391085 is an apocalyptic number.

1391085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1391085 is a deficient number, since it is larger than the sum of its proper divisors (1148595).

1391085 is a wasteful number, since it uses less digits than its factorization.

1391085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1657 (or 1654 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 1391085 is about 1179.4426649905. The cubic root of 1391085 is about 111.6309333452.

The spelling of 1391085 in words is "one million, three hundred ninety-one thousand, eighty-five".