42506605 has 8 divisors (see below), whose sum is σ = 52767000. Its totient is φ = 32832576.

The previous prime is 42506587. The next prime is 42506623. The reversal of 42506605 is 50660524.

It is an interprime number because it is at equal distance from previous prime (42506587) and next prime (42506623).

It can be written as a sum of positive squares in 4 ways, for example, as 5503716 + 37002889 = 2346^2 + 6083^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 42506605 - 2¹³ = 42498413 is a prime.

It is a super-2 number, since 2×42506605² = 3613622937252050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146430 + ... + 146719.

It is an arithmetic number, because the mean of its divisors is an integer number (6595875).

Almost surely, 2^42506605 is an apocalyptic number.

It is an amenable number.

42506605 is a deficient number, since it is larger than the sum of its proper divisors (10260395).

42506605 is a wasteful number, since it uses less digits than its factorization.

42506605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293183.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 42506605 is about 6519.7089658972. The cubic root of 42506605 is about 348.9946797655.

The spelling of 42506605 in words is "forty-two million, five hundred six thousand, six hundred five".