3939545 has 8 divisors (see below), whose sum is σ = 4738824. Its totient is φ = 3144064.

The previous prime is 3939541. The next prime is 3939569. The reversal of 3939545 is 5459393.

It can be written as a sum of positive squares in 4 ways, for example, as 34969 + 3904576 = 187^2 + 1976^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3939545 - 2² = 3939541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3939499 and 3939508.

It is not an unprimeable number, because it can be changed into a prime (3939541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2447 + ... + 3723.

It is an arithmetic number, because the mean of its divisors is an integer number (592353).

Almost surely, 2^3939545 is an apocalyptic number.

It is an amenable number.

3939545 is a deficient number, since it is larger than the sum of its proper divisors (799279).

3939545 is a wasteful number, since it uses less digits than its factorization.

3939545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1899.

The product of its digits is 72900, while the sum is 38.

The square root of 3939545 is about 1984.8287079746. The cubic root of 3939545 is about 157.9363226818.

The spelling of 3939545 in words is "three million, nine hundred thirty-nine thousand, five hundred forty-five".