1371385 has 4 divisors (see below), whose sum is σ = 1645668. Its totient is φ = 1097104.

The previous prime is 1371353. The next prime is 1371389. The reversal of 1371385 is 5831731.

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 480249 + 891136 = 693^2 + 944^2 .

It is a cyclic number.

It is not a de Polignac number, because 1371385 - 2⁵ = 1371353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1371389) 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 3 ways as a sum of consecutive naturals, for example, 137134 + ... + 137143.

It is an arithmetic number, because the mean of its divisors is an integer number (411417).

2^1371385 is an apocalyptic number.

It is an amenable number.

1371385 is a deficient number, since it is larger than the sum of its proper divisors (274283).

1371385 is an equidigital number, since it uses as much as digits as its factorization.

1371385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274282.

The product of its digits is 2520, while the sum is 28.

The square root of 1371385 is about 1171.0614842953. The cubic root of 1371385 is about 111.1014682372.

The spelling of 1371385 in words is "one million, three hundred seventy-one thousand, three hundred eighty-five".