42242923 has 2 divisors, whose sum is σ = 42242924. Its totient is φ = 42242922.

The previous prime is 42242911. The next prime is 42242939. The reversal of 42242923 is 32924224.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42242923 - 2²¹ = 40145771 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42242891 and 42242900.

It is not a weakly prime, because it can be changed into another prime (42242023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21121461 + 21121462.

It is an arithmetic number, because the mean of its divisors is an integer number (21121462).

Almost surely, 2^42242923 is an apocalyptic number.

42242923 is a deficient number, since it is larger than the sum of its proper divisors (1).

42242923 is an equidigital number, since it uses as much as digits as its factorization.

42242923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 28.

The square root of 42242923 is about 6499.4555925862. The cubic root of 42242923 is about 348.2715407179.

The spelling of 42242923 in words is "forty-two million, two hundred forty-two thousand, nine hundred twenty-three".