306147245 has 4 divisors (see below), whose sum is σ = 367376700. Its totient is φ = 244917792.

The previous prime is 306147241. The next prime is 306147251. The reversal of 306147245 is 542741603.

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 83868964 + 222278281 = 9158^2 + 14909^2 .

It is a cyclic number.

It is not a de Polignac number, because 306147245 - 2² = 306147241 is a prime.

It is a super-2 number, since 2×306147245² = 187452271242180050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306147241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30614720 + ... + 30614729.

It is an arithmetic number, because the mean of its divisors is an integer number (91844175).

Almost surely, 2^306147245 is an apocalyptic number.

It is an amenable number.

306147245 is a deficient number, since it is larger than the sum of its proper divisors (61229455).

306147245 is an equidigital number, since it uses as much as digits as its factorization.

306147245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61229454.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 306147245 is about 17497.0638965513. The cubic root of 306147245 is about 673.9744793056.

Adding to 306147245 its reverse (542741603), we get a palindrome (848888848).

The spelling of 306147245 in words is "three hundred six million, one hundred forty-seven thousand, two hundred forty-five".