147243505 has 16 divisors (see below), whose sum is σ = 181725264. Its totient is φ = 114462720.

The previous prime is 147243497. The next prime is 147243517. The reversal of 147243505 is 505342741.

It can be written as a sum of positive squares in 8 ways, for example, as 31315216 + 115928289 = 5596^2 + 10767^2 .

It is not a de Polignac number, because 147243505 - 2³ = 147243497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55489 + ... + 58081.

It is an arithmetic number, because the mean of its divisors is an integer number (11357829).

Almost surely, 2^147243505 is an apocalyptic number.

It is an amenable number.

147243505 is a deficient number, since it is larger than the sum of its proper divisors (34481759).

147243505 is a wasteful number, since it uses less digits than its factorization.

147243505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2916.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 147243505 is about 12134.3934747477. The cubic root of 147243505 is about 528.0544606837.

The spelling of 147243505 in words is "one hundred forty-seven million, two hundred forty-three thousand, five hundred five".