42320249 has 2 divisors, whose sum is σ = 42320250. Its totient is φ = 42320248.

The previous prime is 42320237. The next prime is 42320269. The reversal of 42320249 is 94202324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34140649 + 8179600 = 5843^2 + 2860^2 .

It is a cyclic number.

It is not a de Polignac number, because 42320249 - 2⁸ = 42319993 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (42320269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21160124 + 21160125.

It is an arithmetic number, because the mean of its divisors is an integer number (21160125).

Almost surely, 2^42320249 is an apocalyptic number.

It is an amenable number.

42320249 is a deficient number, since it is larger than the sum of its proper divisors (1).

42320249 is an equidigital number, since it uses as much as digits as its factorization.

42320249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 42320249 is about 6505.4015248868. The cubic root of 42320249 is about 348.4839157763.

The spelling of 42320249 in words is "forty-two million, three hundred twenty thousand, two hundred forty-nine".