42516449 has 2 divisors, whose sum is σ = 42516450. Its totient is φ = 42516448.

The previous prime is 42516437. The next prime is 42516479. The reversal of 42516449 is 94461524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41152225 + 1364224 = 6415^2 + 1168^2 .

It is a cyclic number.

It is not a de Polignac number, because 42516449 - 2⁸ = 42516193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42516479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21258224 + 21258225.

It is an arithmetic number, because the mean of its divisors is an integer number (21258225).

Almost surely, 2^42516449 is an apocalyptic number.

It is an amenable number.

42516449 is a deficient number, since it is larger than the sum of its proper divisors (1).

42516449 is an equidigital number, since it uses as much as digits as its factorization.

42516449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 35.

The square root of 42516449 is about 6520.4638638674. The cubic root of 42516449 is about 349.0216186256.

The spelling of 42516449 in words is "forty-two million, five hundred sixteen thousand, four hundred forty-nine".