1307345 has 8 divisors (see below), whose sum is σ = 1689576. Its totient is φ = 965376.

The previous prime is 1307311. The next prime is 1307347. The reversal of 1307345 is 5437031.

1307345 = 808² + 809².

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 25921 + 1281424 = 161^2 + 1132^2 .

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 1307345 - 2⁶ = 1307281 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1307345.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1307347) 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, 9992 + ... + 10121.

It is an arithmetic number, because the mean of its divisors is an integer number (211197).

2^1307345 is an apocalyptic number.

1307345 is the 809-th centered square number.

It is an amenable number.

1307345 is a deficient number, since it is larger than the sum of its proper divisors (382231).

1307345 is a wasteful number, since it uses less digits than its factorization.

1307345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20131.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 1307345 is about 1143.3918838264. The cubic root of 1307345 is about 109.3444480653.

The spelling of 1307345 in words is "one million, three hundred seven thousand, three hundred forty-five".