42301421 has 2 divisors, whose sum is σ = 42301422. Its totient is φ = 42301420.

The previous prime is 42301361. The next prime is 42301447. The reversal of 42301421 is 12410324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38576521 + 3724900 = 6211^2 + 1930^2 .

It is a cyclic number.

It is not a de Polignac number, because 42301421 - 2²² = 38107117 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42301421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42301451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21150710 + 21150711.

It is an arithmetic number, because the mean of its divisors is an integer number (21150711).

Almost surely, 2^42301421 is an apocalyptic number.

It is an amenable number.

42301421 is a deficient number, since it is larger than the sum of its proper divisors (1).

42301421 is an equidigital number, since it uses as much as digits as its factorization.

42301421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 42301421 is about 6503.9542587567. The cubic root of 42301421 is about 348.4322287110.

Adding to 42301421 its reverse (12410324), we get a palindrome (54711745).

The spelling of 42301421 in words is "forty-two million, three hundred one thousand, four hundred twenty-one".