42459169 has 2 divisors, whose sum is σ = 42459170. Its totient is φ = 42459168.

The previous prime is 42459163. The next prime is 42459187. The reversal of 42459169 is 96195424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42419169 + 40000 = 6513^2 + 200^2 .

It is a cyclic number.

It is not a de Polignac number, because 42459169 - 2⁷ = 42459041 is a prime.

It is a super-2 number, since 2×42459169² = 3605562064341122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42459163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21229584 + 21229585.

It is an arithmetic number, because the mean of its divisors is an integer number (21229585).

Almost surely, 2^42459169 is an apocalyptic number.

It is an amenable number.

42459169 is a deficient number, since it is larger than the sum of its proper divisors (1).

42459169 is an equidigital number, since it uses as much as digits as its factorization.

42459169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 40.

The square root of 42459169 is about 6516.0700579414. The cubic root of 42459169 is about 348.8648091748.

The spelling of 42459169 in words is "forty-two million, four hundred fifty-nine thousand, one hundred sixty-nine".