1345665 has 16 divisors (see below), whose sum is σ = 2167488. Its totient is φ = 712896.

The previous prime is 1345651. The next prime is 1345667. The reversal of 1345665 is 5665431.

It is not a de Polignac number, because 1345665 - 2⁴ = 1345649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1345667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4087 + ... + 4403.

It is an arithmetic number, because the mean of its divisors is an integer number (135468).

2^1345665 is an apocalyptic number.

1345665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1345665 is a deficient number, since it is larger than the sum of its proper divisors (821823).

1345665 is a wasteful number, since it uses less digits than its factorization.

1345665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608.

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

The square root of 1345665 is about 1160.0280169030. The cubic root of 1345665 is about 110.4025197650.

The spelling of 1345665 in words is "one million, three hundred forty-five thousand, six hundred sixty-five".