40035421 has 2 divisors, whose sum is σ = 40035422. Its totient is φ = 40035420.

The previous prime is 40035419. The next prime is 40035427. The reversal of 40035421 is 12453004.

40035421 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., 34222500 + 5812921 = 5850^2 + 2411^2 .

It is a cyclic number.

It is not a de Polignac number, because 40035421 - 2¹ = 40035419 is a prime.

Together with 40035419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40035427) 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, 20017710 + 20017711.

It is an arithmetic number, because the mean of its divisors is an integer number (20017711).

Almost surely, 2^40035421 is an apocalyptic number.

It is an amenable number.

40035421 is a deficient number, since it is larger than the sum of its proper divisors (1).

40035421 is an equidigital number, since it uses as much as digits as its factorization.

40035421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 40035421 is about 6327.3549766075. The cubic root of 40035421 is about 342.0961079825.

Adding to 40035421 its reverse (12453004), we get a palindrome (52488425).

The spelling of 40035421 in words is "forty million, thirty-five thousand, four hundred twenty-one".