1345689 has 6 divisors (see below), whose sum is σ = 1943786. Its totient is φ = 897120.

The previous prime is 1345667. The next prime is 1345691. The reversal of 1345689 is 9865431.

It can be written as a sum of positive squares in only one way, i.e., 1334025 + 11664 = 1155^2 + 108^2 .

It is not a de Polignac number, because 1345689 - 2⁹ = 1345177 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10 and base 16.

It is not an unprimeable number, because it can be changed into a prime (1345649) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 74752 + ... + 74769.

2^1345689 is an apocalyptic number.

It is an amenable number.

1345689 is a deficient number, since it is larger than the sum of its proper divisors (598097).

1345689 is a wasteful number, since it uses less digits than its factorization.

1345689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149527 (or 149524 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 1345689 is about 1160.0383614347. The cubic root of 1345689 is about 110.4031761059.

The spelling of 1345689 in words is "one million, three hundred forty-five thousand, six hundred eighty-nine".