1365985 has 8 divisors (see below), whose sum is σ = 1647720. Its totient is φ = 1087104.

The previous prime is 1365983. The next prime is 1366009. The reversal of 1365985 is 5895631.

It can be written as a sum of positive squares in 4 ways, for example, as 421201 + 944784 = 649^2 + 972^2 .

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 1365985 - 2¹ = 1365983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1365983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 549 + ... + 1741.

It is an arithmetic number, because the mean of its divisors is an integer number (205965).

2^1365985 is an apocalyptic number.

It is an amenable number.

1365985 is a deficient number, since it is larger than the sum of its proper divisors (281735).

1365985 is a wasteful number, since it uses less digits than its factorization.

1365985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1427.

The product of its digits is 32400, while the sum is 37.

The square root of 1365985 is about 1168.7536096201. The cubic root of 1365985 is about 110.9554511056.

The spelling of 1365985 in words is "one million, three hundred sixty-five thousand, nine hundred eighty-five".