3128961 has 16 divisors (see below), whose sum is σ = 4639680. Its totient is φ = 1859520.

The previous prime is 3128941. The next prime is 3128987. The reversal of 3128961 is 1698213.

It is not a de Polignac number, because 3128961 - 2¹⁰ = 3127937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3128921) 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 15 ways as a sum of consecutive naturals, for example, 855 + ... + 2643.

It is an arithmetic number, because the mean of its divisors is an integer number (289980).

Almost surely, 2^3128961 is an apocalyptic number.

It is an amenable number.

3128961 is a deficient number, since it is larger than the sum of its proper divisors (1510719).

3128961 is a wasteful number, since it uses less digits than its factorization.

3128961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856.

The product of its digits is 2592, while the sum is 30.

The square root of 3128961 is about 1768.8869381620. The cubic root of 3128961 is about 146.2626316798.

The spelling of 3128961 in words is "three million, one hundred twenty-eight thousand, nine hundred sixty-one".