4001613121 has 8 divisors (see below), whose sum is σ = 4372524864. Its totient is φ = 3631889520.

The previous prime is 4001613107. The next prime is 4001613131. The reversal of 4001613121 is 1213161004.

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 4001613121 - 2²⁷ = 3867395393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4001613131) 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, 289981 + ... + 303466.

It is an arithmetic number, because the mean of its divisors is an integer number (546565608).

Almost surely, 2^4001613121 is an apocalyptic number.

It is an amenable number.

4001613121 is a deficient number, since it is larger than the sum of its proper divisors (370911743).

4001613121 is a wasteful number, since it uses less digits than its factorization.

4001613121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594071.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 4001613121 is about 63258.3047591381. The cubic root of 4001613121 is about 1587.6144124538.

Adding to 4001613121 its reverse (1213161004), we get a palindrome (5214774125).

The spelling of 4001613121 in words is "four billion, one million, six hundred thirteen thousand, one hundred twenty-one".