42602521 has 4 divisors (see below), whose sum is σ = 45879652. Its totient is φ = 39325392.

The previous prime is 42602519. The next prime is 42602563. The reversal of 42602521 is 12520624.

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 7080921 + 35521600 = 2661^2 + 5960^2 .

It is a cyclic number.

It is not a de Polignac number, because 42602521 - 2¹ = 42602519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42602492 and 42602501.

It is not an unprimeable number, because it can be changed into a prime (42606521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1638546 + ... + 1638571.

It is an arithmetic number, because the mean of its divisors is an integer number (11469913).

Almost surely, 2^42602521 is an apocalyptic number.

It is an amenable number.

42602521 is a deficient number, since it is larger than the sum of its proper divisors (3277131).

42602521 is a wasteful number, since it uses less digits than its factorization.

42602521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3277130.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 42602521 is about 6527.0606707767. The cubic root of 42602521 is about 349.2569843109.

The spelling of 42602521 in words is "forty-two million, six hundred two thousand, five hundred twenty-one".