1304245 has 4 divisors (see below), whose sum is σ = 1565100. Its totient is φ = 1043392.

The previous prime is 1304243. The next prime is 1304249. The reversal of 1304245 is 5424031.

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 459684 + 844561 = 678^2 + 919^2 .

It is a cyclic number.

It is not a de Polignac number, because 1304245 - 2¹ = 1304243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304243) 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 3 ways as a sum of consecutive naturals, for example, 130420 + ... + 130429.

It is an arithmetic number, because the mean of its divisors is an integer number (391275).

2^1304245 is an apocalyptic number.

It is an amenable number.

1304245 is a deficient number, since it is larger than the sum of its proper divisors (260855).

1304245 is an equidigital number, since it uses as much as digits as its factorization.

1304245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260854.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 1304245 is about 1142.0354635474. The cubic root of 1304245 is about 109.2579531552.

Adding to 1304245 its reverse (5424031), we get a palindrome (6728276).

The spelling of 1304245 in words is "one million, three hundred four thousand, two hundred forty-five".