42990259 has 4 divisors (see below), whose sum is σ = 46297216. Its totient is φ = 39683304.

The previous prime is 42990257. The next prime is 42990271. The reversal of 42990259 is 95209924.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42990259 - 2¹ = 42990257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42990257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1653459 + ... + 1653484.

It is an arithmetic number, because the mean of its divisors is an integer number (11574304).

Almost surely, 2^42990259 is an apocalyptic number.

42990259 is a deficient number, since it is larger than the sum of its proper divisors (3306957).

42990259 is a wasteful number, since it uses less digits than its factorization.

42990259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3306956.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 42990259 is about 6556.6957379461. The cubic root of 42990259 is about 350.3133493117.

The spelling of 42990259 in words is "forty-two million, nine hundred ninety thousand, two hundred fifty-nine".