42811961 has 8 divisors (see below), whose sum is σ = 45222144. Its totient is φ = 40466160.

The previous prime is 42811943. The next prime is 42811999. The reversal of 42811961 is 16911824.

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

It is not a de Polignac number, because 42811961 - 2¹⁸ = 42549817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42811061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14726 + ... + 17391.

It is an arithmetic number, because the mean of its divisors is an integer number (5652768).

Almost surely, 2^42811961 is an apocalyptic number.

It is an amenable number.

42811961 is a deficient number, since it is larger than the sum of its proper divisors (2410183).

42811961 is a wasteful number, since it uses less digits than its factorization.

42811961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32191.

The product of its digits is 3456, while the sum is 32.

The square root of 42811961 is about 6543.0849757588. The cubic root of 42811961 is about 349.8283811684.

The spelling of 42811961 in words is "forty-two million, eight hundred eleven thousand, nine hundred sixty-one".