42440159 has 4 divisors (see below), whose sum is σ = 42836904. Its totient is φ = 42043416.

The previous prime is 42440149. The next prime is 42440161. The reversal of 42440159 is 95104424.

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 42440159 - 2¹⁶ = 42374623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42440149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198212 + ... + 198425.

It is an arithmetic number, because the mean of its divisors is an integer number (10709226).

Almost surely, 2^42440159 is an apocalyptic number.

42440159 is a deficient number, since it is larger than the sum of its proper divisors (396745).

42440159 is a wasteful number, since it uses less digits than its factorization.

42440159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396744.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 42440159 is about 6514.6111933100. The cubic root of 42440159 is about 348.8127363232.

The spelling of 42440159 in words is "forty-two million, four hundred forty thousand, one hundred fifty-nine".