3988121 has 8 divisors (see below), whose sum is σ = 4113120. Its totient is φ = 3864672.

The previous prime is 3988097. The next prime is 3988129. The reversal of 3988121 is 1218893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3988121 is a prime.

It is a super-2 number, since 2×3988121² = 31810218221282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3988129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6725 + ... + 7293.

It is an arithmetic number, because the mean of its divisors is an integer number (514140).

Almost surely, 2^3988121 is an apocalyptic number.

It is an amenable number.

3988121 is a deficient number, since it is larger than the sum of its proper divisors (124999).

3988121 is a wasteful number, since it uses less digits than its factorization.

3988121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775.

The product of its digits is 3456, while the sum is 32.

The square root of 3988121 is about 1997.0280418662. The cubic root of 3988121 is about 158.5828099089.

The spelling of 3988121 in words is "three million, nine hundred eighty-eight thousand, one hundred twenty-one".