42002449 has 2 divisors, whose sum is σ = 42002450. Its totient is φ = 42002448.

The previous prime is 42002431. The next prime is 42002459. The reversal of 42002449 is 94420024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27751824 + 14250625 = 5268^2 + 3775^2 .

It is a cyclic number.

It is not a de Polignac number, because 42002449 - 2¹⁷ = 41871377 is a prime.

It is not a weakly prime, because it can be changed into another prime (42002459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21001224 + 21001225.

It is an arithmetic number, because the mean of its divisors is an integer number (21001225).

Almost surely, 2^42002449 is an apocalyptic number.

It is an amenable number.

42002449 is a deficient number, since it is larger than the sum of its proper divisors (1).

42002449 is an equidigital number, since it uses as much as digits as its factorization.

42002449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 42002449 is about 6480.9296401057. The cubic root of 42002449 is about 347.6094205393.

The spelling of 42002449 in words is "forty-two million, two thousand, four hundred forty-nine".