42337921 has 2 divisors, whose sum is σ = 42337922. Its totient is φ = 42337920.

The previous prime is 42337907. The next prime is 42337931. The reversal of 42337921 is 12973324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41796225 + 541696 = 6465^2 + 736^2 .

It is a cyclic number.

It is not a de Polignac number, because 42337921 - 2⁷ = 42337793 is a prime.

It is not a weakly prime, because it can be changed into another prime (42337901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21168960 + 21168961.

It is an arithmetic number, because the mean of its divisors is an integer number (21168961).

Almost surely, 2^42337921 is an apocalyptic number.

It is an amenable number.

42337921 is a deficient number, since it is larger than the sum of its proper divisors (1).

42337921 is an equidigital number, since it uses as much as digits as its factorization.

42337921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 31.

The square root of 42337921 is about 6506.7596390216. The cubic root of 42337921 is about 348.5324154181.

The spelling of 42337921 in words is "forty-two million, three hundred thirty-seven thousand, nine hundred twenty-one".