42245249 has 2 divisors, whose sum is σ = 42245250. Its totient is φ = 42245248.

The previous prime is 42245237. The next prime is 42245251. The reversal of 42245249 is 94254224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35521600 + 6723649 = 5960^2 + 2593^2 .

It is a cyclic number.

It is not a de Polignac number, because 42245249 - 2¹² = 42241153 is a prime.

It is a super-2 number, since 2×42245249² = 3569322126144002, which contains 22 as substring.

Together with 42245251, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42245279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21122624 + 21122625.

It is an arithmetic number, because the mean of its divisors is an integer number (21122625).

Almost surely, 2^42245249 is an apocalyptic number.

It is an amenable number.

42245249 is a deficient number, since it is larger than the sum of its proper divisors (1).

42245249 is an equidigital number, since it uses as much as digits as its factorization.

42245249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 32.

The square root of 42245249 is about 6499.6345281870. The cubic root of 42245249 is about 348.2779328319.

The spelling of 42245249 in words is "forty-two million, two hundred forty-five thousand, two hundred forty-nine".