42524789 has 4 divisors (see below), whose sum is σ = 42626220. Its totient is φ = 42423360.

The previous prime is 42524773. The next prime is 42524791. The reversal of 42524789 is 98742524.

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 819025 + 41705764 = 905^2 + 6458^2 .

It is a cyclic number.

It is not a de Polignac number, because 42524789 - 2⁴ = 42524773 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42529789) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 50084 + ... + 50925.

It is an arithmetic number, because the mean of its divisors is an integer number (10656555).

Almost surely, 2^42524789 is an apocalyptic number.

It is an amenable number.

42524789 is a deficient number, since it is larger than the sum of its proper divisors (101431).

42524789 is a wasteful number, since it uses less digits than its factorization.

42524789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101430.

The product of its digits is 161280, while the sum is 41.

The square root of 42524789 is about 6521.1033575615. The cubic root of 42524789 is about 349.0444384209.

The spelling of 42524789 in words is "forty-two million, five hundred twenty-four thousand, seven hundred eighty-nine".