3865121351 has 16 divisors (see below), whose sum is σ = 4761793344. Its totient is φ = 3055083264.

The previous prime is 3865121347. The next prime is 3865121353. The reversal of 3865121351 is 1531215683.

It is a cyclic number.

It is not a de Polignac number, because 3865121351 - 2² = 3865121347 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3865121353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73445 + ... + 114561.

It is an arithmetic number, because the mean of its divisors is an integer number (297612084).

Almost surely, 2^3865121351 is an apocalyptic number.

3865121351 is a deficient number, since it is larger than the sum of its proper divisors (896671993).

3865121351 is a wasteful number, since it uses less digits than its factorization.

3865121351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42170.

The product of its digits is 21600, while the sum is 35.

The square root of 3865121351 is about 62170.1001366412. The cubic root of 3865121351 is about 1569.3544550122.

The spelling of 3865121351 in words is "three billion, eight hundred sixty-five million, one hundred twenty-one thousand, three hundred fifty-one".