42121301 has 2 divisors, whose sum is σ = 42121302. Its totient is φ = 42121300.

The previous prime is 42121283. The next prime is 42121327. The reversal of 42121301 is 10312124.

42121301 is nontrivially palindromic in base 14.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41667025 + 454276 = 6455^2 + 674^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42121301 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42121351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21060650 + 21060651.

It is an arithmetic number, because the mean of its divisors is an integer number (21060651).

Almost surely, 2^42121301 is an apocalyptic number.

It is an amenable number.

42121301 is a deficient number, since it is larger than the sum of its proper divisors (1).

42121301 is an equidigital number, since it uses as much as digits as its factorization.

42121301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 42121301 is about 6490.0925263050. The cubic root of 42121301 is about 347.9369821373.

Adding to 42121301 its reverse (10312124), we get a palindrome (52433425).

The spelling of 42121301 in words is "forty-two million, one hundred twenty-one thousand, three hundred one".