2100004 has 6 divisors (see below), whose sum is σ = 3675014. Its totient is φ = 1050000.

The previous prime is 2100001. The next prime is 2100011. The reversal of 2100004 is 4000012.

It can be written as a sum of positive squares in only one way, i.e., 1742400 + 357604 = 1320^2 + 598^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2100004.

It is not an unprimeable number, because it can be changed into a prime (2100001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262497 + ... + 262504.

2^2100004 is an apocalyptic number.

It is an amenable number.

2100004 is a deficient number, since it is larger than the sum of its proper divisors (1575010).

2100004 is a wasteful number, since it uses less digits than its factorization.

2100004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525005 (or 525003 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 2100004 is about 1449.1390547494. The cubic root of 2100004 is about 128.0579978053.

Adding to 2100004 its reverse (4000012), we get a palindrome (6100016).

The spelling of 2100004 in words is "two million, one hundred thousand, four".