42466581 has 6 divisors (see below), whose sum is σ = 61340630. Its totient is φ = 28311048.

The previous prime is 42466573. The next prime is 42466601. The reversal of 42466581 is 18566424.

It can be written as a sum of positive squares in only one way, i.e., 41486481 + 980100 = 6441^2 + 990^2 .

It is not a de Polignac number, because 42466581 - 2³ = 42466573 is a prime.

It is a super-2 number, since 2×42466581² = 3606821003659122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42466511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2359246 + ... + 2359263.

Almost surely, 2^42466581 is an apocalyptic number.

It is an amenable number.

42466581 is a deficient number, since it is larger than the sum of its proper divisors (18874049).

42466581 is a wasteful number, since it uses less digits than its factorization.

42466581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4718515 (or 4718512 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 42466581 is about 6516.6387808440. The cubic root of 42466581 is about 348.8851081709.

The spelling of 42466581 in words is "forty-two million, four hundred sixty-six thousand, five hundred eighty-one".