2100104 has 8 divisors (see below), whose sum is σ = 3937710. Its totient is φ = 1050048.

The previous prime is 2100097. The next prime is 2100113. The reversal of 2100104 is 4010012.

It can be written as a sum of positive squares in only one way, i.e., 1612900 + 487204 = 1270^2 + 698^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a Harshad number since it is a multiple of its sum of digits (8), and also a Moran number because the ratio is a prime number: 262513 = 2100104 / (2 + 1 + 0 + 0 + 1 + 0 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 2100091 and 2100100.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131249 + ... + 131264.

2^2100104 is an apocalyptic number.

It is an amenable number.

2100104 is a deficient number, since it is larger than the sum of its proper divisors (1837606).

2100104 is a wasteful number, since it uses less digits than its factorization.

2100104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262519 (or 262515 counting only the distinct ones).

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

The square root of 2100104 is about 1449.1735575838. The cubic root of 2100104 is about 128.0600304358.

Adding to 2100104 its reverse (4010012), we get a palindrome (6110116).

The spelling of 2100104 in words is "two million, one hundred thousand, one hundred four".