42305161 has 4 divisors (see below), whose sum is σ = 42336000. Its totient is φ = 42274324.

The previous prime is 42305143. The next prime is 42305167. The reversal of 42305161 is 16150324.

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 42305161 - 2¹¹ = 42303113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42305167) 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, 13261 + ... + 16138.

It is an arithmetic number, because the mean of its divisors is an integer number (10584000).

Almost surely, 2^42305161 is an apocalyptic number.

It is an amenable number.

42305161 is a deficient number, since it is larger than the sum of its proper divisors (30839).

42305161 is a wasteful number, since it uses less digits than its factorization.

42305161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30838.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 42305161 is about 6504.2417697992. The cubic root of 42305161 is about 348.4424970668.

Adding to 42305161 its reverse (16150324), we get a palindrome (58455485).

The spelling of 42305161 in words is "forty-two million, three hundred five thousand, one hundred sixty-one".