42131161 has 2 divisors, whose sum is σ = 42131162. Its totient is φ = 42131160.

The previous prime is 42131153. The next prime is 42131183. The reversal of 42131161 is 16113124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21483225 + 20647936 = 4635^2 + 4544^2 .

It is a cyclic number.

It is not a de Polignac number, because 42131161 - 2³ = 42131153 is a prime.

It is not a weakly prime, because it can be changed into another prime (42132161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21065580 + 21065581.

It is an arithmetic number, because the mean of its divisors is an integer number (21065581).

Almost surely, 2^42131161 is an apocalyptic number.

It is an amenable number.

42131161 is a deficient number, since it is larger than the sum of its proper divisors (1).

42131161 is an equidigital number, since it uses as much as digits as its factorization.

42131161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 19.

The square root of 42131161 is about 6490.8521012268. The cubic root of 42131161 is about 347.9641290591.

Adding to 42131161 its reverse (16113124), we get a palindrome (58244285).

The spelling of 42131161 in words is "forty-two million, one hundred thirty-one thousand, one hundred sixty-one".