42122237 has 2 divisors, whose sum is σ = 42122238. Its totient is φ = 42122236.

The previous prime is 42122233. The next prime is 42122257. The reversal of 42122237 is 73222124.

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., 39262756 + 2859481 = 6266^2 + 1691^2 .

It is a cyclic number.

It is not a de Polignac number, because 42122237 - 2² = 42122233 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 (42122231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21061118 + 21061119.

It is an arithmetic number, because the mean of its divisors is an integer number (21061119).

Almost surely, 2^42122237 is an apocalyptic number.

It is an amenable number.

42122237 is a deficient number, since it is larger than the sum of its proper divisors (1).

42122237 is an equidigital number, since it uses as much as digits as its factorization.

42122237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 23.

The square root of 42122237 is about 6490.1646358163. The cubic root of 42122237 is about 347.9395593496.

The spelling of 42122237 in words is "forty-two million, one hundred twenty-two thousand, two hundred thirty-seven".