40021017 has 8 divisors (see below), whose sum is σ = 54496896. Its totient is φ = 26112912.

The previous prime is 40021001. The next prime is 40021021. The reversal of 40021017 is 71012004.

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

It is not a de Polignac number, because 40021017 - 2⁴ = 40021001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40020987 and 40021005.

It is not an unprimeable number, because it can be changed into a prime (40021117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141778 + ... + 142059.

It is an arithmetic number, because the mean of its divisors is an integer number (6812112).

Almost surely, 2^40021017 is an apocalyptic number.

40021017 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

It is an amenable number.

40021017 is a deficient number, since it is larger than the sum of its proper divisors (14475879).

40021017 is a wasteful number, since it uses less digits than its factorization.

40021017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283887.

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 40021017 is about 6326.2166418800. The cubic root of 40021017 is about 342.0550764553.

The spelling of 40021017 in words is "forty million, twenty-one thousand, seventeen".