42939641 has 4 divisors (see below), whose sum is σ = 42982800. Its totient is φ = 42896484.

The previous prime is 42939613. The next prime is 42939653. The reversal of 42939641 is 14693924.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42939641 - 2⁶ = 42939577 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42939595 and 42939604.

It is not an unprimeable number, because it can be changed into a prime (42939041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20051 + ... + 22088.

It is an arithmetic number, because the mean of its divisors is an integer number (10745700).

Almost surely, 2^42939641 is an apocalyptic number.

It is an amenable number.

42939641 is a deficient number, since it is larger than the sum of its proper divisors (43159).

42939641 is a wasteful number, since it uses less digits than its factorization.

42939641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43158.

The product of its digits is 46656, while the sum is 38.

The square root of 42939641 is about 6552.8345774939. The cubic root of 42939641 is about 350.1758055554.

The spelling of 42939641 in words is "forty-two million, nine hundred thirty-nine thousand, six hundred forty-one".