4239605 has 8 divisors (see below), whose sum is σ = 5211864. Its totient is φ = 3308800.

The previous prime is 4239601. The next prime is 4239607. The reversal of 4239605 is 5069324.

It can be written as a sum of positive squares in 4 ways, for example, as 167281 + 4072324 = 409^2 + 2018^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4239605 - 2² = 4239601 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4239601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10136 + ... + 10545.

It is an arithmetic number, because the mean of its divisors is an integer number (651483).

Almost surely, 2^4239605 is an apocalyptic number.

It is an amenable number.

4239605 is a deficient number, since it is larger than the sum of its proper divisors (972259).

4239605 is a wasteful number, since it uses less digits than its factorization.

4239605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20727.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 4239605 is about 2059.0301114845. The cubic root of 4239605 is about 161.8484204259.

It can be divided in two parts, 4 and 239605, that multiplied together give a triangular number (958420 = T₁₃₈₄).

The spelling of 4239605 in words is "four million, two hundred thirty-nine thousand, six hundred five".