40121305 has 8 divisors (see below), whose sum is σ = 55023552. Its totient is φ = 27511728.

The previous prime is 40121303. The next prime is 40121317. The reversal of 40121305 is 50312104.

40121305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40121305 - 2¹ = 40121303 is a prime.

It is a super-2 number, since 2×40121305² = 3219438229806050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40121303) 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 7 ways as a sum of consecutive naturals, for example, 573127 + ... + 573196.

It is an arithmetic number, because the mean of its divisors is an integer number (6877944).

Almost surely, 2^40121305 is an apocalyptic number.

It is an amenable number.

40121305 is a deficient number, since it is larger than the sum of its proper divisors (14902247).

40121305 is a wasteful number, since it uses less digits than its factorization.

40121305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146335.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 40121305 is about 6334.1380629096. The cubic root of 40121305 is about 342.3405548359.

Adding to 40121305 its reverse (50312104), we get a palindrome (90433409).

The spelling of 40121305 in words is "forty million, one hundred twenty-one thousand, three hundred five".