305242545 has 32 divisors (see below), whose sum is σ = 527212800. Its totient is φ = 150343424.

The previous prime is 305242541. The next prime is 305242547. The reversal of 305242545 is 545242503.

It is not a de Polignac number, because 305242545 - 2² = 305242541 is a prime.

It is a super-2 number, since 2×305242545² = 186346022556154050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (305242541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5250 + ... + 25259.

It is an arithmetic number, because the mean of its divisors is an integer number (16475400).

Almost surely, 2^305242545 is an apocalyptic number.

It is an amenable number.

305242545 is a deficient number, since it is larger than the sum of its proper divisors (221970255).

305242545 is a wasteful number, since it uses less digits than its factorization.

305242545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30569.

The product of its (nonzero) digits is 24000, while the sum is 30.

The square root of 305242545 is about 17471.1918597444. The cubic root of 305242545 is about 673.3099338065.

The spelling of 305242545 in words is "three hundred five million, two hundred forty-two thousand, five hundred forty-five".