3887121 has 24 divisors (see below), whose sum is σ = 6230784. Its totient is φ = 2147040.

The previous prime is 3887111. The next prime is 3887129. The reversal of 3887121 is 1217883.

It is a happy number.

It is not a de Polignac number, because 3887121 - 2⁶ = 3887057 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (3887129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4131 + ... + 4983.

It is an arithmetic number, because the mean of its divisors is an integer number (259616).

Almost surely, 2^3887121 is an apocalyptic number.

3887121 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3887121 is a deficient number, since it is larger than the sum of its proper divisors (2343663).

3887121 is a wasteful number, since it uses less digits than its factorization.

3887121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901 (or 894 counting only the distinct ones).

The product of its digits is 2688, while the sum is 30.

The square root of 3887121 is about 1971.5783017674. The cubic root of 3887121 is about 157.2326328022.

The spelling of 3887121 in words is "three million, eight hundred eighty-seven thousand, one hundred twenty-one".