3939541 has 2 divisors, whose sum is σ = 3939542. Its totient is φ = 3939540.

The previous prime is 3939539. The next prime is 3939569. The reversal of 3939541 is 1459393.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2387025 + 1552516 = 1545^2 + 1246^2 .

It is a cyclic number.

It is not a de Polignac number, because 3939541 - 2¹ = 3939539 is a prime.

Together with 3939539, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 3939497 and 3939506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3939521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1969770 + 1969771.

It is an arithmetic number, because the mean of its divisors is an integer number (1969771).

Almost surely, 2^3939541 is an apocalyptic number.

It is an amenable number.

3939541 is a deficient number, since it is larger than the sum of its proper divisors (1).

3939541 is an equidigital number, since it uses as much as digits as its factorization.

3939541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14580, while the sum is 34.

The square root of 3939541 is about 1984.8277003307. The cubic root of 3939541 is about 157.9362692284.

The spelling of 3939541 in words is "three million, nine hundred thirty-nine thousand, five hundred forty-one".