4239505 has 4 divisors (see below), whose sum is σ = 5087412. Its totient is φ = 3391600.

The previous prime is 4239493. The next prime is 4239509. The reversal of 4239505 is 5059324.

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 2598544 + 1640961 = 1612^2 + 1281^2 .

It is not a de Polignac number, because 4239505 - 2¹³ = 4231313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4239509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423946 + ... + 423955.

It is an arithmetic number, because the mean of its divisors is an integer number (1271853).

Almost surely, 2^4239505 is an apocalyptic number.

It is an amenable number.

4239505 is a deficient number, since it is larger than the sum of its proper divisors (847907).

4239505 is an equidigital number, since it uses as much as digits as its factorization.

4239505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847906.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 4239505 is about 2059.0058280636. The cubic root of 4239505 is about 161.8471479041.

The spelling of 4239505 in words is "four million, two hundred thirty-nine thousand, five hundred five".