42881641 has 8 divisors (see below), whose sum is σ = 47218464. Its totient is φ = 38617920.

The previous prime is 42881627. The next prime is 42881647. The reversal of 42881641 is 14618824.

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

It is not a de Polignac number, because 42881641 - 2¹⁵ = 42848873 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42881597 and 42881606.

It is not an unprimeable number, because it can be changed into a prime (42881647) 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, 17040 + ... + 19393.

It is an arithmetic number, because the mean of its divisors is an integer number (5902308).

Almost surely, 2^42881641 is an apocalyptic number.

It is an amenable number.

42881641 is a deficient number, since it is larger than the sum of its proper divisors (4336823).

42881641 is a wasteful number, since it uses less digits than its factorization.

42881641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36551.

The product of its digits is 12288, while the sum is 34.

The square root of 42881641 is about 6548.4075163356. The cubic root of 42881641 is about 350.0180698154.

It can be divided in two parts, 4288 and 1641, that added together give a square (5929 = 77²).

The spelling of 42881641 in words is "forty-two million, eight hundred eighty-one thousand, six hundred forty-one".