42435289 has 8 divisors (see below), whose sum is σ = 46214280. Its totient is φ = 38729856.

The previous prime is 42435277. The next prime is 42435293. The reversal of 42435289 is 98253424.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5017600 + 37417689 = 2240^2 + 6117^2 .

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 42435289 - 2¹³ = 42427097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42435389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17182 + ... + 19495.

It is an arithmetic number, because the mean of its divisors is an integer number (5776785).

Almost surely, 2^42435289 is an apocalyptic number.

It is an amenable number.

42435289 is a deficient number, since it is larger than the sum of its proper divisors (3778991).

42435289 is a wasteful number, since it uses less digits than its factorization.

42435289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36779.

The product of its digits is 69120, while the sum is 37.

The square root of 42435289 is about 6514.2374074023. The cubic root of 42435289 is about 348.7993937482.

It can be divided in two parts, 42435 and 289, that added together give a palindrome (42724).

The spelling of 42435289 in words is "forty-two million, four hundred thirty-five thousand, two hundred eighty-nine".