42939101 has 2 divisors, whose sum is σ = 42939102. Its totient is φ = 42939100.

The previous prime is 42939097. The next prime is 42939109. The reversal of 42939101 is 10193924.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27931225 + 15007876 = 5285^2 + 3874^2 .

It is a cyclic number.

It is not a de Polignac number, because 42939101 - 2² = 42939097 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42939109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21469550 + 21469551.

It is an arithmetic number, because the mean of its divisors is an integer number (21469551).

Almost surely, 2^42939101 is an apocalyptic number.

It is an amenable number.

42939101 is a deficient number, since it is larger than the sum of its proper divisors (1).

42939101 is an equidigital number, since it uses as much as digits as its factorization.

42939101 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 42939101 is about 6552.7933738216. The cubic root of 42939101 is about 350.1743376365.

The spelling of 42939101 in words is "forty-two million, nine hundred thirty-nine thousand, one hundred one".