42264581 has 2 divisors, whose sum is σ = 42264582. Its totient is φ = 42264580.

The previous prime is 42264553. The next prime is 42264617. The reversal of 42264581 is 18546224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41344900 + 919681 = 6430^2 + 959^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42264581 is a prime.

It is a super-2 number, since 2×42264581² = 3572589614211122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42264881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21132290 + 21132291.

It is an arithmetic number, because the mean of its divisors is an integer number (21132291).

Almost surely, 2^42264581 is an apocalyptic number.

It is an amenable number.

42264581 is a deficient number, since it is larger than the sum of its proper divisors (1).

42264581 is an equidigital number, since it uses as much as digits as its factorization.

42264581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15360, while the sum is 32.

The square root of 42264581 is about 6501.1215186305. The cubic root of 42264581 is about 348.3310503019.

The spelling of 42264581 in words is "forty-two million, two hundred sixty-four thousand, five hundred eighty-one".