40411421 has 2 divisors, whose sum is σ = 40411422. Its totient is φ = 40411420.

The previous prime is 40411417. The next prime is 40411447. The reversal of 40411421 is 12411404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36060025 + 4351396 = 6005^2 + 2086^2 .

It is a cyclic number.

It is not a de Polignac number, because 40411421 - 2² = 40411417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40411421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40411411) 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, 20205710 + 20205711.

It is an arithmetic number, because the mean of its divisors is an integer number (20205711).

Almost surely, 2^40411421 is an apocalyptic number.

It is an amenable number.

40411421 is a deficient number, since it is larger than the sum of its proper divisors (1).

40411421 is an equidigital number, since it uses as much as digits as its factorization.

40411421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 40411421 is about 6356.9977977029. The cubic root of 40411421 is about 343.1637254665.

Subtracting from 40411421 its sum of digits (17), we obtain a palindrome (40411404).

Adding to 40411421 its reverse (12411404), we get a palindrome (52822825).

The spelling of 40411421 in words is "forty million, four hundred eleven thousand, four hundred twenty-one".