42440061 has 4 divisors (see below), whose sum is σ = 56586752. Its totient is φ = 28293372.

The previous prime is 42440059. The next prime is 42440071. The reversal of 42440061 is 16004424.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 42440061 - 2¹ = 42440059 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 (42440051) 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, 7073341 + ... + 7073346.

It is an arithmetic number, because the mean of its divisors is an integer number (14146688).

Almost surely, 2^42440061 is an apocalyptic number.

It is an amenable number.

42440061 is a deficient number, since it is larger than the sum of its proper divisors (14146691).

42440061 is a wasteful number, since it uses less digits than its factorization.

42440061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14146690.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 42440061 is about 6514.6036717516. The cubic root of 42440061 is about 348.8124678379.

Adding to 42440061 its reverse (16004424), we get a palindrome (58444485).

The spelling of 42440061 in words is "forty-two million, four hundred forty thousand, sixty-one".