4040521 has 8 divisors (see below), whose sum is σ = 4294400. Its totient is φ = 3790800.

The previous prime is 4040513. The next prime is 4040527. The reversal of 4040521 is 1250404.

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 4040521 - 2³ = 4040513 is a prime.

It is a super-3 number, since 3×4040521³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4040495 and 4040504.

It is not an unprimeable number, because it can be changed into a prime (4040527) 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, 1096 + ... + 3046.

It is an arithmetic number, because the mean of its divisors is an integer number (536800).

Almost surely, 2^4040521 is an apocalyptic number.

It is an amenable number.

4040521 is a deficient number, since it is larger than the sum of its proper divisors (253879).

4040521 is a wasteful number, since it uses less digits than its factorization.

4040521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 4040521 is about 2010.1047236400. The cubic root of 4040521 is about 159.2743309408.

Adding to 4040521 its reverse (1250404), we get a palindrome (5290925).

The spelling of 4040521 in words is "four million, forty thousand, five hundred twenty-one".