42630881 has 8 divisors (see below), whose sum is σ = 43170600. Its totient is φ = 42094080.

The previous prime is 42630871. The next prime is 42630893. The reversal of 42630881 is 18803624.

It can be written as a sum of positive squares in 4 ways, for example, as 1478656 + 41152225 = 1216^2 + 6415^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 42630881 - 2¹⁴ = 42614497 is a prime.

It is a super-2 number, since 2×42630881² = 3634784029672322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42630871) 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, 45425 + ... + 46353.

It is an arithmetic number, because the mean of its divisors is an integer number (5396325).

Almost surely, 2^42630881 is an apocalyptic number.

It is an amenable number.

42630881 is a deficient number, since it is larger than the sum of its proper divisors (539719).

42630881 is a wasteful number, since it uses less digits than its factorization.

42630881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1459.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 42630881 is about 6529.2328033238. The cubic root of 42630881 is about 349.3344658839.

The spelling of 42630881 in words is "forty-two million, six hundred thirty thousand, eight hundred eighty-one".