42423617 has 2 divisors, whose sum is σ = 42423618. Its totient is φ = 42423616.

The previous prime is 42423613. The next prime is 42423631. The reversal of 42423617 is 71632424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23726641 + 18696976 = 4871^2 + 4324^2 .

It is a cyclic number.

It is not a de Polignac number, because 42423617 - 2² = 42423613 is a prime.

It is equal to p_2571806 and since 42423617 and 2571806 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42423617.

It is not a weakly prime, because it can be changed into another prime (42423611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21211808 + 21211809.

It is an arithmetic number, because the mean of its divisors is an integer number (21211809).

Almost surely, 2^42423617 is an apocalyptic number.

It is an amenable number.

42423617 is a deficient number, since it is larger than the sum of its proper divisors (1).

42423617 is an equidigital number, since it uses as much as digits as its factorization.

42423617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 29.

The square root of 42423617 is about 6513.3414619533. The cubic root of 42423617 is about 348.7674112486.

The spelling of 42423617 in words is "forty-two million, four hundred twenty-three thousand, six hundred seventeen".