306142145 has 4 divisors (see below), whose sum is σ = 367370580. Its totient is φ = 244913712.

The previous prime is 306142141. The next prime is 306142147. The reversal of 306142145 is 541241603.

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 94497841 + 211644304 = 9721^2 + 14548^2 .

It is a cyclic number.

It is not a de Polignac number, because 306142145 - 2² = 306142141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (306142141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30614210 + ... + 30614219.

It is an arithmetic number, because the mean of its divisors is an integer number (91842645).

Almost surely, 2^306142145 is an apocalyptic number.

It is an amenable number.

306142145 is a deficient number, since it is larger than the sum of its proper divisors (61228435).

306142145 is an equidigital number, since it uses as much as digits as its factorization.

306142145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61228434.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 306142145 is about 17496.9181572070. The cubic root of 306142145 is about 673.9707367830.

Adding to 306142145 its reverse (541241603), we get a palindrome (847383748).

The spelling of 306142145 in words is "three hundred six million, one hundred forty-two thousand, one hundred forty-five".