3921875 has 14 divisors (see below), whose sum is σ = 4921812. Its totient is φ = 3125000.

The previous prime is 3921859. The next prime is 3921877. The reversal of 3921875 is 5781293.

It is not a de Polignac number, because 3921875 - 2⁴ = 3921859 is a prime.

It is a super-2 number, since 2×3921875² = 30762207031250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3921877) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 15500 + ... + 15750.

It is an arithmetic number, because the mean of its divisors is an integer number (351558).

Almost surely, 2^3921875 is an apocalyptic number.

3921875 is a deficient number, since it is larger than the sum of its proper divisors (999937).

3921875 is an frugal number, since it uses more digits than its factorization.

3921875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281 (or 256 counting only the distinct ones).

The product of its digits is 15120, while the sum is 35.

The square root of 3921875 is about 1980.3724397194. The cubic root of 3921875 is about 157.6998387166.

It can be divided in two parts, 39218 and 75, that added together give a palindrome (39293).

The spelling of 3921875 in words is "three million, nine hundred twenty-one thousand, eight hundred seventy-five".