40510421 has 4 divisors (see below), whose sum is σ = 46297632. Its totient is φ = 34723212.

The previous prime is 40510373. The next prime is 40510423. The reversal of 40510421 is 12401504.

40510421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40510421 - 2⁶ = 40510357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40510421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40510423) 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 in 3 ways as a sum of consecutive naturals, for example, 2893595 + ... + 2893608.

It is an arithmetic number, because the mean of its divisors is an integer number (11574408).

Almost surely, 2^40510421 is an apocalyptic number.

It is an amenable number.

40510421 is a deficient number, since it is larger than the sum of its proper divisors (5787211).

40510421 is an equidigital number, since it uses as much as digits as its factorization.

40510421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5787210.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 40510421 is about 6364.7797291030. The cubic root of 40510421 is about 343.4437247268.

Adding to 40510421 its reverse (12401504), we get a palindrome (52911925).

The spelling of 40510421 in words is "forty million, five hundred ten thousand, four hundred twenty-one".