42161297 has 2 divisors, whose sum is σ = 42161298. Its totient is φ = 42161296.

The previous prime is 42161293. The next prime is 42161359. The reversal of 42161297 is 79216124.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39325441 + 2835856 = 6271^2 + 1684^2 .

It is a cyclic number.

It is not a de Polignac number, because 42161297 - 2² = 42161293 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42161293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21080648 + 21080649.

It is an arithmetic number, because the mean of its divisors is an integer number (21080649).

Almost surely, 2^42161297 is an apocalyptic number.

It is an amenable number.

42161297 is a deficient number, since it is larger than the sum of its proper divisors (1).

42161297 is an equidigital number, since it uses as much as digits as its factorization.

42161297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The square root of 42161297 is about 6493.1731071950. The cubic root of 42161297 is about 348.0470743779.

The spelling of 42161297 in words is "forty-two million, one hundred sixty-one thousand, two hundred ninety-seven".