40240321 has 4 divisors (see below), whose sum is σ = 43898544. Its totient is φ = 36582100.

The previous prime is 40240261. The next prime is 40240339. The reversal of 40240321 is 12304204.

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 40240321 - 2¹¹ = 40238273 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40240295 and 40240304.

It is not an unprimeable number, because it can be changed into a prime (40240351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1829095 + ... + 1829116.

It is an arithmetic number, because the mean of its divisors is an integer number (10974636).

Almost surely, 2^40240321 is an apocalyptic number.

It is an amenable number.

40240321 is a deficient number, since it is larger than the sum of its proper divisors (3658223).

40240321 is a wasteful number, since it uses less digits than its factorization.

40240321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3658222.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 40240321 is about 6343.5259122983. The cubic root of 40240321 is about 342.6787274686.

Adding to 40240321 its reverse (12304204), we get a palindrome (52544525).

The spelling of 40240321 in words is "forty million, two hundred forty thousand, three hundred twenty-one".