40170321 has 6 divisors (see below), whose sum is σ = 58023810. Its totient is φ = 26780208.

The previous prime is 40170311. The next prime is 40170323. The reversal of 40170321 is 12307104.

40170321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 35569296 + 4601025 = 5964^2 + 2145^2 .

It is not a de Polignac number, because 40170321 - 2¹⁷ = 40039249 is a prime.

It is a super-2 number, since 2×40170321² = 3227309378486082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40170294 and 40170303.

It is not an unprimeable number, because it can be changed into a prime (40170323) 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 5 ways as a sum of consecutive naturals, for example, 2231676 + ... + 2231693.

It is an arithmetic number, because the mean of its divisors is an integer number (9670635).

Almost surely, 2^40170321 is an apocalyptic number.

It is an amenable number.

40170321 is a deficient number, since it is larger than the sum of its proper divisors (17853489).

40170321 is a wasteful number, since it uses less digits than its factorization.

40170321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4463375 (or 4463372 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 40170321 is about 6338.0060744685. The cubic root of 40170321 is about 342.4799100227.

Adding to 40170321 its reverse (12307104), we get a palindrome (52477425).

The spelling of 40170321 in words is "forty million, one hundred seventy thousand, three hundred twenty-one".