40121315 has 32 divisors (see below), whose sum is σ = 55351296. Its totient is φ = 27688320.

The previous prime is 40121303. The next prime is 40121317. The reversal of 40121315 is 51312104.

40121315 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40121315 - 2⁶ = 40121251 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40121293 and 40121302.

It is not an unprimeable number, because it can be changed into a prime (40121317) 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 31 ways as a sum of consecutive naturals, for example, 69980 + ... + 70550.

It is an arithmetic number, because the mean of its divisors is an integer number (1729728).

Almost surely, 2^40121315 is an apocalyptic number.

40121315 is a deficient number, since it is larger than the sum of its proper divisors (15229981).

40121315 is a wasteful number, since it uses less digits than its factorization.

40121315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 40121315 is about 6334.1388522829. The cubic root of 40121315 is about 342.3405832781.

Adding to 40121315 its reverse (51312104), we get a palindrome (91433419).

The spelling of 40121315 in words is "forty million, one hundred twenty-one thousand, three hundred fifteen".