305245 has 8 divisors (see below), whose sum is σ = 375480. Its totient is φ = 238080.

The previous prime is 305243. The next prime is 305267. The reversal of 305245 is 542503.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3844 + 301401 = 62^2 + 549^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 305245 - 2¹ = 305243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305243) 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, 540 + ... + 949.

It is an arithmetic number, because the mean of its divisors is an integer number (46935).

2³⁰⁵²⁴⁵ is an apocalyptic number.

It is an amenable number.

305245 is a deficient number, since it is larger than the sum of its proper divisors (70235).

305245 is a wasteful number, since it uses less digits than its factorization.

305245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1535.

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 305245 is about 552.4898189107. The cubic root of 305245 is about 67.3311738897.

Adding to 305245 its reverse (542503), we get a palindrome (847748).

The spelling of 305245 in words is "three hundred five thousand, two hundred forty-five".