4128361 has 2 divisors, whose sum is σ = 4128362. Its totient is φ = 4128360.

The previous prime is 4128359. The next prime is 4128367. The reversal of 4128361 is 1638214.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4080400 + 47961 = 2020^2 + 219^2 .

It is a cyclic number.

It is not a de Polignac number, because 4128361 - 2¹ = 4128359 is a prime.

Together with 4128359, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (4128367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2064180 + 2064181.

It is an arithmetic number, because the mean of its divisors is an integer number (2064181).

Almost surely, 2^4128361 is an apocalyptic number.

It is an amenable number.

4128361 is a deficient number, since it is larger than the sum of its proper divisors (1).

4128361 is an equidigital number, since it uses as much as digits as its factorization.

4128361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 25.

The square root of 4128361 is about 2031.8368536868. The cubic root of 4128361 is about 160.4202623433.

It can be divided in two parts, 4128 and 361, that added together give a square (4489 = 67²).

The spelling of 4128361 in words is "four million, one hundred twenty-eight thousand, three hundred sixty-one".