42603161 has 2 divisors, whose sum is σ = 42603162. Its totient is φ = 42603160.

The previous prime is 42603131. The next prime is 42603163. The reversal of 42603161 is 16130624.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30913600 + 11689561 = 5560^2 + 3419^2 .

It is a cyclic number.

It is not a de Polignac number, because 42603161 - 2²² = 38408857 is a prime.

Together with 42603163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42603163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21301580 + 21301581.

It is an arithmetic number, because the mean of its divisors is an integer number (21301581).

Almost surely, 2^42603161 is an apocalyptic number.

It is an amenable number.

42603161 is a deficient number, since it is larger than the sum of its proper divisors (1).

42603161 is an equidigital number, since it uses as much as digits as its factorization.

42603161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 42603161 is about 6527.1096972550. The cubic root of 42603161 is about 349.2587332164.

Adding to 42603161 its reverse (16130624), we get a palindrome (58733785).

The spelling of 42603161 in words is "forty-two million, six hundred three thousand, one hundred sixty-one".