3961251121 has 8 divisors (see below), whose sum is σ = 4066020000. Its totient is φ = 3856870560.

The previous prime is 3961251097. The next prime is 3961251163. The reversal of 3961251121 is 1211521693.

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 3961251121 - 2⁹ = 3961250609 is a prime.

It is a super-3 number, since 3×3961251121³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3961251181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76351 + ... + 117268.

It is an arithmetic number, because the mean of its divisors is an integer number (508252500).

Almost surely, 2^3961251121 is an apocalyptic number.

It is an amenable number.

3961251121 is a deficient number, since it is larger than the sum of its proper divisors (104768879).

3961251121 is a wasteful number, since it uses less digits than its factorization.

3961251121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194159.

The product of its digits is 3240, while the sum is 31.

The square root of 3961251121 is about 62938.4709140602. The cubic root of 3961251121 is about 1582.2585763428.

The spelling of 3961251121 in words is "three billion, nine hundred sixty-one million, two hundred fifty-one thousand, one hundred twenty-one".