102100004 has 12 divisors (see below), whose sum is σ = 183033228. Its totient is φ = 49804800.

The previous prime is 102100003. The next prime is 102100007. The reversal of 102100004 is 400001201.

It can be written as a sum of positive squares in 2 ways, for example, as 46895104 + 55204900 = 6848^2 + 7430^2 .

It is a junction number, because it is equal to n+sod(n) for n = 102099964 and 102100000.

It is not an unprimeable number, because it can be changed into a prime (102100001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311117 + ... + 311444.

It is an arithmetic number, because the mean of its divisors is an integer number (15252769).

Almost surely, 2^102100004 is an apocalyptic number.

It is an amenable number.

102100004 is a deficient number, since it is larger than the sum of its proper divisors (80933224).

102100004 is a wasteful number, since it uses less digits than its factorization.

102100004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622606 (or 622604 counting only the distinct ones).

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

The square root of 102100004 is about 10104.4546611878. The cubic root of 102100004 is about 467.3855195488.

Adding to 102100004 its reverse (400001201), we get a palindrome (502101205).

The spelling of 102100004 in words is "one hundred two million, one hundred thousand, four".