305012145 has 32 divisors (see below), whose sum is σ = 493713792. Its totient is φ = 160788992.

The previous prime is 305012129. The next prime is 305012153. The reversal of 305012145 is 541210503.

It is a cyclic number.

It is not a de Polignac number, because 305012145 - 2⁴ = 305012129 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 688294 + ... + 688736.

It is an arithmetic number, because the mean of its divisors is an integer number (15428556).

Almost surely, 2^305012145 is an apocalyptic number.

It is an amenable number.

305012145 is a deficient number, since it is larger than the sum of its proper divisors (188701647).

305012145 is a wasteful number, since it uses less digits than its factorization.

305012145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 305012145 is about 17464.5969034501. The cubic root of 305012145 is about 673.1404842338.

Adding to 305012145 its reverse (541210503), we get a palindrome (846222648).

The spelling of 305012145 in words is "three hundred five million, twelve thousand, one hundred forty-five".