102604221 has 6 divisors (see below), whose sum is σ = 148206110. Its totient is φ = 68402808.

The previous prime is 102604213. The next prime is 102604223. The reversal of 102604221 is 122406201.

It can be written as a sum of positive squares in only one way, i.e., 66243321 + 36360900 = 8139^2 + 6030^2 .

It is not a de Polignac number, because 102604221 - 2³ = 102604213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102604194 and 102604203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102604223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5700226 + ... + 5700243.

Almost surely, 2^102604221 is an apocalyptic number.

It is an amenable number.

102604221 is a deficient number, since it is larger than the sum of its proper divisors (45601889).

102604221 is a wasteful number, since it uses less digits than its factorization.

102604221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11400475 (or 11400472 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 102604221 is about 10129.3741662553. The cubic root of 102604221 is about 468.1536450380.

The spelling of 102604221 in words is "one hundred two million, six hundred four thousand, two hundred twenty-one".