4038641 has 2 divisors, whose sum is σ = 4038642. Its totient is φ = 4038640.

The previous prime is 4038637. The next prime is 4038647. The reversal of 4038641 is 1468304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2608225 + 1430416 = 1615^2 + 1196^2 .

It is a cyclic number.

It is not a de Polignac number, because 4038641 - 2² = 4038637 is a prime.

It is a super-2 number, since 2×4038641² = 32621242253762, which contains 22 as substring.

It is a Chen prime.

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 4038641.

It is not a weakly prime, because it can be changed into another prime (4038647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2019320 + 2019321.

It is an arithmetic number, because the mean of its divisors is an integer number (2019321).

Almost surely, 2^4038641 is an apocalyptic number.

It is an amenable number.

4038641 is a deficient number, since it is larger than the sum of its proper divisors (1).

4038641 is an equidigital number, since it uses as much as digits as its factorization.

4038641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 4038641 is about 2009.6370319040. The cubic root of 4038641 is about 159.2496243749.

The spelling of 4038641 in words is "four million, thirty-eight thousand, six hundred forty-one".