3939245 has 8 divisors (see below), whose sum is σ = 4740120. Its totient is φ = 3142720.

The previous prime is 3939241. The next prime is 3939259. The reversal of 3939245 is 5429393.

It can be written as a sum of positive squares in 4 ways, for example, as 14884 + 3924361 = 122^2 + 1981^2 .

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

It is not a de Polignac number, because 3939245 - 2² = 3939241 is a prime.

It is a d-powerful number, because it can be written as 3⁵ + 9⁴ + 3¹¹ + 9⁶ + 2²¹ + 4¹⁰ + 5⁷ .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3939241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1451 + ... + 3159.

It is an arithmetic number, because the mean of its divisors is an integer number (592515).

Almost surely, 2^3939245 is an apocalyptic number.

It is an amenable number.

3939245 is a deficient number, since it is larger than the sum of its proper divisors (800875).

3939245 is a wasteful number, since it uses less digits than its factorization.

3939245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2175.

The product of its digits is 29160, while the sum is 35.

The square root of 3939245 is about 1984.7531332637. The cubic root of 3939245 is about 157.9323135809.

The spelling of 3939245 in words is "three million, nine hundred thirty-nine thousand, two hundred forty-five".