40113021 has 16 divisors (see below), whose sum is σ = 57726144. Its totient is φ = 24630144.

The previous prime is 40113019. The next prime is 40113049. The reversal of 40113021 is 12031104.

It is a happy number.

40113021 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 40113021 - 2¹ = 40113019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40112988 and 40113006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40113221) 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 15 ways as a sum of consecutive naturals, for example, 23230 + ... + 24896.

It is an arithmetic number, because the mean of its divisors is an integer number (3607884).

Almost surely, 2^40113021 is an apocalyptic number.

It is an amenable number.

40113021 is a deficient number, since it is larger than the sum of its proper divisors (17613123).

40113021 is a wasteful number, since it uses less digits than its factorization.

40113021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2300.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 40113021 is about 6333.4841122403. The cubic root of 40113021 is about 342.3169917576.

Adding to 40113021 its reverse (12031104), we get a palindrome (52144125).

The spelling of 40113021 in words is "forty million, one hundred thirteen thousand, twenty-one".