42011939 has 2 divisors, whose sum is σ = 42011940. Its totient is φ = 42011938.

The previous prime is 42011933. The next prime is 42011941. The reversal of 42011939 is 93911024.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42011939 - 2¹² = 42007843 is a prime.

Together with 42011941, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42011933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21005969 + 21005970.

It is an arithmetic number, because the mean of its divisors is an integer number (21005970).

Almost surely, 2^42011939 is an apocalyptic number.

42011939 is a deficient number, since it is larger than the sum of its proper divisors (1).

42011939 is an equidigital number, since it uses as much as digits as its factorization.

42011939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 42011939 is about 6481.6617468054. The cubic root of 42011939 is about 347.6355981001.

The spelling of 42011939 in words is "forty-two million, eleven thousand, nine hundred thirty-nine".