40420573 has 2 divisors, whose sum is σ = 40420574. Its totient is φ = 40420572.

The previous prime is 40420553. The next prime is 40420643. The reversal of 40420573 is 37502404.

40420573 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22629049 + 17791524 = 4757^2 + 4218^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40420573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40420553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20210286 + 20210287.

It is an arithmetic number, because the mean of its divisors is an integer number (20210287).

Almost surely, 2^40420573 is an apocalyptic number.

It is an amenable number.

40420573 is a deficient number, since it is larger than the sum of its proper divisors (1).

40420573 is an equidigital number, since it uses as much as digits as its factorization.

40420573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 40420573 is about 6357.7175936023. The cubic root of 40420573 is about 343.1896290129.

Adding to 40420573 its reverse (37502404), we get a palindrome (77922977).

The spelling of 40420573 in words is "forty million, four hundred twenty thousand, five hundred seventy-three".