42124001 has 2 divisors, whose sum is σ = 42124002. Its totient is φ = 42124000.

The previous prime is 42123973. The next prime is 42124003. The reversal of 42124001 is 10042124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41667025 + 456976 = 6455^2 + 676^2 .

It is a cyclic number.

It is not a de Polignac number, because 42124001 - 2⁶ = 42123937 is a prime.

Together with 42124003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42124003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21062000 + 21062001.

It is an arithmetic number, because the mean of its divisors is an integer number (21062001).

Almost surely, 2^42124001 is an apocalyptic number.

It is an amenable number.

42124001 is a deficient number, since it is larger than the sum of its proper divisors (1).

42124001 is an equidigital number, since it uses as much as digits as its factorization.

42124001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 42124001 is about 6490.3005323328. The cubic root of 42124001 is about 347.9444162997.

Adding to 42124001 its reverse (10042124), we get a palindrome (52166125).

The spelling of 42124001 in words is "forty-two million, one hundred twenty-four thousand, one".