4040323121 has 8 divisors (see below), whose sum is σ = 4091360040. Its totient is φ = 3989411712.

The previous prime is 4040323117. The next prime is 4040323159. The reversal of 4040323121 is 1213230404.

It can be written as a sum of positive squares in 4 ways, for example, as 983449600 + 3056873521 = 31360^2 + 55289^2 .

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 4040323121 - 2² = 4040323117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4040323093 and 4040323102.

It is not an unprimeable number, because it can be changed into a prime (4040323321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34271 + ... + 96203.

It is an arithmetic number, because the mean of its divisors is an integer number (511420005).

Almost surely, 2^4040323121 is an apocalyptic number.

It is an amenable number.

4040323121 is a deficient number, since it is larger than the sum of its proper divisors (51036919).

4040323121 is an equidigital number, since it uses as much as digits as its factorization.

4040323121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62755.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 4040323121 is about 63563.5360957837. The cubic root of 4040323121 is about 1592.7173081739.

Adding to 4040323121 its reverse (1213230404), we get a palindrome (5253553525).

The spelling of 4040323121 in words is "four billion, forty million, three hundred twenty-three thousand, one hundred twenty-one".