42409259 has 4 divisors (see below), whose sum is σ = 43128120. Its totient is φ = 41690400.

The previous prime is 42409253. The next prime is 42409261. The reversal of 42409259 is 95290424.

42409259 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42409259 - 2⁴ = 42409243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42409253) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 359342 + ... + 359459.

It is an arithmetic number, because the mean of its divisors is an integer number (10782030).

Almost surely, 2^42409259 is an apocalyptic number.

42409259 is a deficient number, since it is larger than the sum of its proper divisors (718861).

42409259 is an equidigital number, since it uses as much as digits as its factorization.

42409259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718860.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 42409259 is about 6512.2391694409. The cubic root of 42409259 is about 348.7280607808.

The spelling of 42409259 in words is "forty-two million, four hundred nine thousand, two hundred fifty-nine".