3121604 has 6 divisors (see below), whose sum is σ = 5462814. Its totient is φ = 1560800.

The previous prime is 3121603. The next prime is 3121609. The reversal of 3121604 is 4061213.

3121604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2402500 + 719104 = 1550^2 + 848^2 .

It is not an unprimeable number, because it can be changed into a prime (3121603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390197 + ... + 390204.

It is an arithmetic number, because the mean of its divisors is an integer number (910469).

Almost surely, 2^3121604 is an apocalyptic number.

It is an amenable number.

3121604 is a deficient number, since it is larger than the sum of its proper divisors (2341210).

3121604 is a wasteful number, since it uses less digits than its factorization.

3121604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780405 (or 780403 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 3121604 is about 1766.8061580151. The cubic root of 3121604 is about 146.1479079056.

Adding to 3121604 its reverse (4061213), we get a palindrome (7182817).

The spelling of 3121604 in words is "three million, one hundred twenty-one thousand, six hundred four".