42466721 has 4 divisors (see below), whose sum is σ = 46327344. Its totient is φ = 38606100.

The previous prime is 42466681. The next prime is 42466747. The reversal of 42466721 is 12766424.

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 42466721 - 2¹⁰ = 42465697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42466751) 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, 1930295 + ... + 1930316.

It is an arithmetic number, because the mean of its divisors is an integer number (11581836).

Almost surely, 2^42466721 is an apocalyptic number.

It is an amenable number.

42466721 is a deficient number, since it is larger than the sum of its proper divisors (3860623).

42466721 is a wasteful number, since it uses less digits than its factorization.

42466721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3860622.

The product of its digits is 16128, while the sum is 32.

The square root of 42466721 is about 6516.6495225691. The cubic root of 42466721 is about 348.8854915615.

The spelling of 42466721 in words is "forty-two million, four hundred sixty-six thousand, seven hundred twenty-one".