42020357 has 2 divisors, whose sum is σ = 42020358. Its totient is φ = 42020356.

The previous prime is 42020351. The next prime is 42020369. The reversal of 42020357 is 75302024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41357761 + 662596 = 6431^2 + 814^2 .

It is a cyclic number.

It is not a de Polignac number, because 42020357 - 2²⁰ = 40971781 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42020351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21010178 + 21010179.

It is an arithmetic number, because the mean of its divisors is an integer number (21010179).

Almost surely, 2^42020357 is an apocalyptic number.

It is an amenable number.

42020357 is a deficient number, since it is larger than the sum of its proper divisors (1).

42020357 is an equidigital number, since it uses as much as digits as its factorization.

42020357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 42020357 is about 6482.3110847907. The cubic root of 42020357 is about 347.6588153180.

The spelling of 42020357 in words is "forty-two million, twenty thousand, three hundred fifty-seven".