42123461 has 2 divisors, whose sum is σ = 42123462.
Its totient is φ = 42123460.
The previous prime is 42123449. The next prime is 42123469. The reversal of 42123461 is 16432124.
Adding to 42123461 its reverse (16432124), we get a palindrome (58555585).
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 39816100 + 2307361 = 6310^2 + 1519^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-42123461 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 (42123469) by changing a digit.
It is a good prime.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21061730 + 21061731.
It is an arithmetic number, because the mean of its divisors is an integer number (21061731).
Almost surely, 242123461 is an apocalyptic number.
It is an amenable number.
42123461 is a deficient number, since it is larger than the sum of its proper divisors (1).
42123461 is an equidigital number, since it uses as much as digits as its factorization.
42123461 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 1152, while the sum is 23.
The square root of 42123461 is about 6490.2589316606.
The cubic root of 42123461 is about 347.9429294926.
The spelling of 42123461 in words is "forty-two million, one hundred twenty-three thousand, four hundred sixty-one".