42042271 has 2 divisors, whose sum is σ = 42042272. Its totient is φ = 42042270.

The previous prime is 42042263. The next prime is 42042283. The reversal of 42042271 is 17224024.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42042271 - 2³ = 42042263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42042211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21021135 + 21021136.

It is an arithmetic number, because the mean of its divisors is an integer number (21021136).

Almost surely, 2^42042271 is an apocalyptic number.

42042271 is a deficient number, since it is larger than the sum of its proper divisors (1).

42042271 is an equidigital number, since it uses as much as digits as its factorization.

42042271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 42042271 is about 6484.0011566933. The cubic root of 42042271 is about 347.7192405644.

Adding to 42042271 its reverse (17224024), we get a palindrome (59266295).

The spelling of 42042271 in words is "forty-two million, forty-two thousand, two hundred seventy-one".