42171449 has 2 divisors, whose sum is σ = 42171450. Its totient is φ = 42171448.

The previous prime is 42171421. The next prime is 42171457. The reversal of 42171449 is 94417124.

42171449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39942400 + 2229049 = 6320^2 + 1493^2 .

It is a cyclic number.

It is not a de Polignac number, because 42171449 - 2⁸ = 42171193 is a prime.

It is a super-2 number, since 2×42171449² = 3556862221519202, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42171049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21085724 + 21085725.

It is an arithmetic number, because the mean of its divisors is an integer number (21085725).

Almost surely, 2^42171449 is an apocalyptic number.

It is an amenable number.

42171449 is a deficient number, since it is larger than the sum of its proper divisors (1).

42171449 is an equidigital number, since it uses as much as digits as its factorization.

42171449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 32.

The square root of 42171449 is about 6493.9548042776. The cubic root of 42171449 is about 348.0750075029.

The spelling of 42171449 in words is "forty-two million, one hundred seventy-one thousand, four hundred forty-nine".