42347605 has 8 divisors (see below), whose sum is σ = 50946264. Its totient is φ = 33792000.

The previous prime is 42347597. The next prime is 42347621. The reversal of 42347605 is 50674324.

42347605 = 4601² + 4602².

It can be written as a sum of positive squares in 4 ways, for example, as 21178404 + 21169201 = 4602^2 + 4601^2 .

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

It is not a de Polignac number, because 42347605 - 2³ = 42347597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8556 + ... + 12565.

It is an arithmetic number, because the mean of its divisors is an integer number (6368283).

Almost surely, 2^42347605 is an apocalyptic number.

42347605 is the 4602-nd centered square number.

It is an amenable number.

42347605 is a deficient number, since it is larger than the sum of its proper divisors (8598659).

42347605 is a wasteful number, since it uses less digits than its factorization.

42347605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21527.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 42347605 is about 6507.5037456770. The cubic root of 42347605 is about 348.5589867953.

The spelling of 42347605 in words is "forty-two million, three hundred forty-seven thousand, six hundred five".