40124321 has 4 divisors (see below), whose sum is σ = 40138644. Its totient is φ = 40110000.

The previous prime is 40124303. The next prime is 40124327. The reversal of 40124321 is 12342104.

40124321 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.

It can be written as a sum of positive squares in 2 ways, for example, as 25000000 + 15124321 = 5000^2 + 3889^2 .

It is a cyclic number.

It is not a de Polignac number, because 40124321 - 2¹⁸ = 39862177 is a prime.

It is a super-2 number, since 2×40124321² = 3219922271422082, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40124321.

It is not an unprimeable number, because it can be changed into a prime (40124327) 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, 1430 + ... + 9071.

It is an arithmetic number, because the mean of its divisors is an integer number (10034661).

Almost surely, 2^40124321 is an apocalyptic number.

It is an amenable number.

40124321 is a deficient number, since it is larger than the sum of its proper divisors (14323).

40124321 is a wasteful number, since it uses less digits than its factorization.

40124321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14322.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 40124321 is about 6334.3761334483. The cubic root of 40124321 is about 342.3491327660.

Adding to 40124321 its reverse (12342104), we get a palindrome (52466425).

The spelling of 40124321 in words is "forty million, one hundred twenty-four thousand, three hundred twenty-one".