42020437 has 2 divisors, whose sum is σ = 42020438. Its totient is φ = 42020436.

The previous prime is 42020393. The next prime is 42020441. The reversal of 42020437 is 73402024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27815076 + 14205361 = 5274^2 + 3769^2 .

It is a cyclic number.

It is not a de Polignac number, because 42020437 - 2⁷ = 42020309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42027437) 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, 21010218 + 21010219.

It is an arithmetic number, because the mean of its divisors is an integer number (21010219).

Almost surely, 2^42020437 is an apocalyptic number.

It is an amenable number.

42020437 is a deficient number, since it is larger than the sum of its proper divisors (1).

42020437 is an equidigital number, since it uses as much as digits as its factorization.

42020437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 42020437 is about 6482.3172554265. The cubic root of 42020437 is about 347.6590359467.

The spelling of 42020437 in words is "forty-two million, twenty thousand, four hundred thirty-seven".