42169249 has 2 divisors, whose sum is σ = 42169250. Its totient is φ = 42169248.

The previous prime is 42169223. The next prime is 42169261. The reversal of 42169249 is 94296124.

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., 29778849 + 12390400 = 5457^2 + 3520^2 .

It is a cyclic number.

It is not a de Polignac number, because 42169249 - 2¹¹ = 42167201 is a prime.

It is a super-2 number, since 2×42169249² = 3556491122448002, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42169349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21084624 + 21084625.

It is an arithmetic number, because the mean of its divisors is an integer number (21084625).

Almost surely, 2^42169249 is an apocalyptic number.

It is an amenable number.

42169249 is a deficient number, since it is larger than the sum of its proper divisors (1).

42169249 is an equidigital number, since it uses as much as digits as its factorization.

42169249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 37.

The square root of 42169249 is about 6493.7854137629. The cubic root of 42169249 is about 348.0689546058.

The spelling of 42169249 in words is "forty-two million, one hundred sixty-nine thousand, two hundred forty-nine".