2164004 has 6 divisors (see below), whose sum is σ = 3787014. Its totient is φ = 1082000.

The previous prime is 2164003. The next prime is 2164013. The reversal of 2164004 is 4004612.

It can be written as a sum of positive squares in only one way, i.e., 2102500 + 61504 = 1450^2 + 248^2 .

It is not an unprimeable number, because it can be changed into a prime (2164003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270497 + ... + 270504.

It is an arithmetic number, because the mean of its divisors is an integer number (631169).

2^2164004 is an apocalyptic number.

It is an amenable number.

2164004 is a deficient number, since it is larger than the sum of its proper divisors (1623010).

2164004 is a wasteful number, since it uses less digits than its factorization.

2164004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541005 (or 541003 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2164004 is about 1471.0554034434. The cubic root of 2164004 is about 129.3459057699.

Adding to 2164004 its reverse (4004612), we get a palindrome (6168616).

The spelling of 2164004 in words is "two million, one hundred sixty-four thousand, four".