42506923 has 2 divisors, whose sum is σ = 42506924. Its totient is φ = 42506922.

The previous prime is 42506909. The next prime is 42506957. The reversal of 42506923 is 32960524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42506923 - 2⁹ = 42506411 is a prime.

It is a plaindrome in base 16.

It is not a weakly prime, because it can be changed into another prime (42506903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21253461 + 21253462.

It is an arithmetic number, because the mean of its divisors is an integer number (21253462).

Almost surely, 2^42506923 is an apocalyptic number.

42506923 is a deficient number, since it is larger than the sum of its proper divisors (1).

42506923 is an equidigital number, since it uses as much as digits as its factorization.

42506923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 42506923 is about 6519.7333534432. The cubic root of 42506923 is about 348.9955500619.

The spelling of 42506923 in words is "forty-two million, five hundred six thousand, nine hundred twenty-three".