42879161 has 8 divisors (see below), whose sum is σ = 46242504. Its totient is φ = 39525120.

The previous prime is 42879131. The next prime is 42879163. The reversal of 42879161 is 16197824.

It can be written as a sum of positive squares in 4 ways, for example, as 5290000 + 37589161 = 2300^2 + 6131^2 .

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 42879161 - 2¹⁸ = 42617017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42879163) 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, 9521 + ... + 13281.

It is an arithmetic number, because the mean of its divisors is an integer number (5780313).

Almost surely, 2^42879161 is an apocalyptic number.

It is an amenable number.

42879161 is a deficient number, since it is larger than the sum of its proper divisors (3363343).

42879161 is a wasteful number, since it uses less digits than its factorization.

42879161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4651.

The product of its digits is 24192, while the sum is 38.

The square root of 42879161 is about 6548.2181545822. The cubic root of 42879161 is about 350.0113220827.

The spelling of 42879161 in words is "forty-two million, eight hundred seventy-nine thousand, one hundred sixty-one".