420067581 has 8 divisors (see below), whose sum is σ = 579403680. Its totient is φ = 270388272.

The previous prime is 420067573. The next prime is 420067601. The reversal of 420067581 is 185760024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 420067581 - 2³ = 420067573 is a prime.

It is a super-2 number, since 2×420067581² = 352913545214383122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420067511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2414095 + ... + 2414268.

It is an arithmetic number, because the mean of its divisors is an integer number (72425460).

Almost surely, 2^420067581 is an apocalyptic number.

It is an amenable number.

420067581 is a deficient number, since it is larger than the sum of its proper divisors (159336099).

420067581 is a wasteful number, since it uses less digits than its factorization.

420067581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4828395.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 420067581 is about 20495.5502731691. The cubic root of 420067581 is about 748.9274036696.

The spelling of 420067581 in words is "four hundred twenty million, sixty-seven thousand, five hundred eighty-one".