42623249 has 2 divisors, whose sum is σ = 42623250. Its totient is φ = 42623248.

The previous prime is 42623227. The next prime is 42623279. The reversal of 42623249 is 94232624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33814225 + 8809024 = 5815^2 + 2968^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42623249 is a prime.

It is not a weakly prime, because it can be changed into another prime (42623279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21311624 + 21311625.

It is an arithmetic number, because the mean of its divisors is an integer number (21311625).

Almost surely, 2^42623249 is an apocalyptic number.

It is an amenable number.

42623249 is a deficient number, since it is larger than the sum of its proper divisors (1).

42623249 is an equidigital number, since it uses as much as digits as its factorization.

42623249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 32.

The square root of 42623249 is about 6528.6483287125. The cubic root of 42623249 is about 349.3136180877.

The spelling of 42623249 in words is "forty-two million, six hundred twenty-three thousand, two hundred forty-nine".