1302309 has 6 divisors (see below), whose sum is σ = 1881126. Its totient is φ = 868200.

The previous prime is 1302293. The next prime is 1302313. The reversal of 1302309 is 9032031.

It can be written as a sum of positive squares in only one way, i.e., 1102500 + 199809 = 1050^2 + 447^2 .

It is not a de Polignac number, because 1302309 - 2⁴ = 1302293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1302291 and 1302300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1302349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72342 + ... + 72359.

It is an arithmetic number, because the mean of its divisors is an integer number (313521).

2^1302309 is an apocalyptic number.

It is an amenable number.

1302309 is a deficient number, since it is larger than the sum of its proper divisors (578817).

1302309 is a wasteful number, since it uses less digits than its factorization.

1302309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144707 (or 144704 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1302309 is about 1141.1875393641. The cubic root of 1302309 is about 109.2038661434.

The spelling of 1302309 in words is "one million, three hundred two thousand, three hundred nine".