42255923 has 2 divisors, whose sum is σ = 42255924. Its totient is φ = 42255922.

The previous prime is 42255919. The next prime is 42255949. The reversal of 42255923 is 32955224.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42255923 - 2² = 42255919 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42255923.

It is not a weakly prime, because it can be changed into another prime (42255973) 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, 21127961 + 21127962.

It is an arithmetic number, because the mean of its divisors is an integer number (21127962).

Almost surely, 2^42255923 is an apocalyptic number.

42255923 is a deficient number, since it is larger than the sum of its proper divisors (1).

42255923 is an equidigital number, since it uses as much as digits as its factorization.

42255923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 32.

The square root of 42255923 is about 6500.4555994176. The cubic root of 42255923 is about 348.3072631960.

The spelling of 42255923 in words is "forty-two million, two hundred fifty-five thousand, nine hundred twenty-three".