42442061 has 4 divisors (see below), whose sum is σ = 44287392. Its totient is φ = 40596732.

The previous prime is 42442033. The next prime is 42442073. The reversal of 42442061 is 16024424.

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 a cyclic number.

It is not a de Polignac number, because 42442061 - 2¹⁰ = 42441037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 1845307 = 42442061 / (4 + 2 + 4 + 4 + 2 + 0 + 6 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42442661) 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, 922631 + ... + 922676.

It is an arithmetic number, because the mean of its divisors is an integer number (11071848).

Almost surely, 2^42442061 is an apocalyptic number.

It is an amenable number.

42442061 is a deficient number, since it is larger than the sum of its proper divisors (1845331).

42442061 is a wasteful number, since it uses less digits than its factorization.

42442061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845330.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 42442061 is about 6514.7571712229. The cubic root of 42442061 is about 348.8179470476.

Adding to 42442061 its reverse (16024424), we get a palindrome (58466485).

The spelling of 42442061 in words is "forty-two million, four hundred forty-two thousand, sixty-one".