1339645 has 4 divisors (see below), whose sum is σ = 1607580. Its totient is φ = 1071712.

The previous prime is 1339643. The next prime is 1339661. The reversal of 1339645 is 5469331.

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 956484 + 383161 = 978^2 + 619^2 .

It is a cyclic number.

It is not a de Polignac number, because 1339645 - 2¹ = 1339643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1339643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133960 + ... + 133969.

It is an arithmetic number, because the mean of its divisors is an integer number (401895).

2^1339645 is an apocalyptic number.

It is an amenable number.

1339645 is a deficient number, since it is larger than the sum of its proper divisors (267935).

1339645 is an equidigital number, since it uses as much as digits as its factorization.

1339645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267934.

The product of its digits is 9720, while the sum is 31.

The square root of 1339645 is about 1157.4303434764. The cubic root of 1339645 is about 110.2376405093.

The spelling of 1339645 in words is "one million, three hundred thirty-nine thousand, six hundred forty-five".