4128931 has 2 divisors, whose sum is σ = 4128932. Its totient is φ = 4128930.

The previous prime is 4128913. The next prime is 4128959. The reversal of 4128931 is 1398214.

It is a happy number.

Together with previous prime (4128913) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (4128959) can be obtained adding 4128931 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4128931 - 2⁵ = 4128899 is a prime.

It is a super-2 number, since 2×4128931² = 34096142405522, which contains 22 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 4128931.

It is not a weakly prime, because it can be changed into another prime (4128911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2064465 + 2064466.

It is an arithmetic number, because the mean of its divisors is an integer number (2064466).

Almost surely, 2^4128931 is an apocalyptic number.

4128931 is a deficient number, since it is larger than the sum of its proper divisors (1).

4128931 is an equidigital number, since it uses as much as digits as its factorization.

4128931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 28.

The square root of 4128931 is about 2031.9771160129. The cubic root of 4128931 is about 160.4276450424.

The spelling of 4128931 in words is "four million, one hundred twenty-eight thousand, nine hundred thirty-one".