1365645 has 16 divisors (see below), whose sum is σ = 2201472. Its totient is φ = 722880.

The previous prime is 1365583. The next prime is 1365659. The reversal of 1365645 is 5465631.

It is not a de Polignac number, because 1365645 - 2¹⁰ = 1364621 is a prime.

It is a super-3 number, since 3×1365645³ = 7640727507797133375, which contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2464 + ... + 2966.

It is an arithmetic number, because the mean of its divisors is an integer number (137592).

2^1365645 is an apocalyptic number.

1365645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1365645 is a deficient number, since it is larger than the sum of its proper divisors (835827).

1365645 is a wasteful number, since it uses less digits than its factorization.

1365645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692.

The product of its digits is 10800, while the sum is 30.

The square root of 1365645 is about 1168.6081464717. The cubic root of 1365645 is about 110.9462445663.

The spelling of 1365645 in words is "one million, three hundred sixty-five thousand, six hundred forty-five".