3128971 has 4 divisors (see below), whose sum is σ = 3139344. Its totient is φ = 3118600.

The previous prime is 3128941. The next prime is 3128987. The reversal of 3128971 is 1798213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1798213 = 67 ⋅26839.

It is a cyclic number.

It is not a de Polignac number, because 3128971 - 2⁷ = 3128843 is a prime.

It is a super-3 number, since 3×3128971³ = 91902191733382327833, which contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3128921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4720 + ... + 5341.

It is an arithmetic number, because the mean of its divisors is an integer number (784836).

Almost surely, 2^3128971 is an apocalyptic number.

3128971 is a deficient number, since it is larger than the sum of its proper divisors (10373).

3128971 is a wasteful number, since it uses less digits than its factorization.

3128971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10372.

The product of its digits is 3024, while the sum is 31.

The square root of 3128971 is about 1768.8897647960. The cubic root of 3128971 is about 146.2627874956.

The spelling of 3128971 in words is "three million, one hundred twenty-eight thousand, nine hundred seventy-one".