3128761 has 2 divisors, whose sum is σ = 3128762. Its totient is φ = 3128760.

The previous prime is 3128747. The next prime is 3128767. The reversal of 3128761 is 1678213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1849600 + 1279161 = 1360^2 + 1131^2 .

It is a cyclic number.

It is not a de Polignac number, because 3128761 - 2⁵ = 3128729 is a prime.

It is not a weakly prime, because it can be changed into another prime (3128767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1564380 + 1564381.

It is an arithmetic number, because the mean of its divisors is an integer number (1564381).

Almost surely, 2^3128761 is an apocalyptic number.

It is an amenable number.

3128761 is a deficient number, since it is larger than the sum of its proper divisors (1).

3128761 is an equidigital number, since it uses as much as digits as its factorization.

3128761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 28.

The square root of 3128761 is about 1768.8304045329. The cubic root of 3128761 is about 146.2595152939.

The spelling of 3128761 in words is "three million, one hundred twenty-eight thousand, seven hundred sixty-one".