42261223 has 2 divisors, whose sum is σ = 42261224. Its totient is φ = 42261222.

The previous prime is 42261221. The next prime is 42261229. The reversal of 42261223 is 32216224.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42261223 - 2¹ = 42261221 is a prime.

Together with 42261221, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 42261194 and 42261203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42261221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21130611 + 21130612.

It is an arithmetic number, because the mean of its divisors is an integer number (21130612).

Almost surely, 2^42261223 is an apocalyptic number.

42261223 is a deficient number, since it is larger than the sum of its proper divisors (1).

42261223 is an equidigital number, since it uses as much as digits as its factorization.

42261223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 22.

The square root of 42261223 is about 6500.8632503691. The cubic root of 42261223 is about 348.3218248731.

Adding to 42261223 its reverse (32216224), we get a palindrome (74477447).

The spelling of 42261223 in words is "forty-two million, two hundred sixty-one thousand, two hundred twenty-three".