102100424 has 8 divisors (see below), whose sum is σ = 191438310. Its totient is φ = 51050208.

The previous prime is 102100421. The next prime is 102100451. The reversal of 102100424 is 424001201.

It can be written as a sum of positive squares in only one way, i.e., 87796900 + 14303524 = 9370^2 + 3782^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 102100399 and 102100408.

It is not an unprimeable number, because it can be changed into a prime (102100421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6381269 + ... + 6381284.

Almost surely, 2^102100424 is an apocalyptic number.

It is an amenable number.

102100424 is a deficient number, since it is larger than the sum of its proper divisors (89337886).

102100424 is a wasteful number, since it uses less digits than its factorization.

102100424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12762559 (or 12762555 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 102100424 is about 10104.4754440792. The cubic root of 102100424 is about 467.3861604291.

Adding to 102100424 its reverse (424001201), we get a palindrome (526101625).

The spelling of 102100424 in words is "one hundred two million, one hundred thousand, four hundred twenty-four".