42521435 has 8 divisors (see below), whose sum is σ = 55664496. Its totient is φ = 30924640.

The previous prime is 42521419. The next prime is 42521443. The reversal of 42521435 is 53412524.

It is a happy number.

42521435 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 42521435 - 2⁴ = 42521419 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386504 + ... + 386613.

It is an arithmetic number, because the mean of its divisors is an integer number (6958062).

Almost surely, 2^42521435 is an apocalyptic number.

42521435 is a deficient number, since it is larger than the sum of its proper divisors (13143061).

42521435 is a wasteful number, since it uses less digits than its factorization.

42521435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773133.

The product of its digits is 4800, while the sum is 26.

The square root of 42521435 is about 6520.8461874208. The cubic root of 42521435 is about 349.0352616102.

Adding to 42521435 its reverse (53412524), we get a palindrome (95933959).

The spelling of 42521435 in words is "forty-two million, five hundred twenty-one thousand, four hundred thirty-five".