42281123 has 2 divisors, whose sum is σ = 42281124. Its totient is φ = 42281122.

The previous prime is 42281119. The next prime is 42281131. The reversal of 42281123 is 32118224.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42281123 - 2² = 42281119 is a prime.

It is a super-2 number, since 2×42281123² = 3575386724282258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42280123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21140561 + 21140562.

It is an arithmetic number, because the mean of its divisors is an integer number (21140562).

Almost surely, 2^42281123 is an apocalyptic number.

42281123 is a deficient number, since it is larger than the sum of its proper divisors (1).

42281123 is an equidigital number, since it uses as much as digits as its factorization.

42281123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 23.

The square root of 42281123 is about 6502.3936361928. The cubic root of 42281123 is about 348.3764889845.

Adding to 42281123 its reverse (32118224), we get a palindrome (74399347).

The spelling of 42281123 in words is "forty-two million, two hundred eighty-one thousand, one hundred twenty-three".