42436161 has 24 divisors (see below), whose sum is σ = 62459904. Its totient is φ = 27760320.

The previous prime is 42436129. The next prime is 42436171. The reversal of 42436161 is 16163424.

42436161 is a `hidden beast` number, since 4 + 2 + 43 + 616 + 1 = 666.

It is not a de Polignac number, because 42436161 - 2⁵ = 42436129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42436111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 156456 + ... + 156726.

It is an arithmetic number, because the mean of its divisors is an integer number (2602496).

Almost surely, 2^42436161 is an apocalyptic number.

It is an amenable number.

42436161 is a deficient number, since it is larger than the sum of its proper divisors (20023743).

42436161 is a wasteful number, since it uses less digits than its factorization.

42436161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541 (or 538 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 42436161 is about 6514.3043373794. The cubic root of 42436161 is about 348.8017828839.

Adding to 42436161 its reverse (16163424), we get a palindrome (58599585).

It can be divided in two parts, 4243 and 6161, that added together give a square (10404 = 102²).

The spelling of 42436161 in words is "forty-two million, four hundred thirty-six thousand, one hundred sixty-one".