102004247 has 4 divisors (see below), whose sum is σ = 103295520. Its totient is φ = 100712976.

The previous prime is 102004219. The next prime is 102004249. The reversal of 102004247 is 742400201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102004247 - 2⁶ = 102004183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102004249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 645518 + ... + 645675.

It is an arithmetic number, because the mean of its divisors is an integer number (25823880).

Almost surely, 2^102004247 is an apocalyptic number.

102004247 is a deficient number, since it is larger than the sum of its proper divisors (1291273).

102004247 is an equidigital number, since it uses as much as digits as its factorization.

102004247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291272.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 102004247 is about 10099.7151940042. The cubic root of 102004247 is about 467.2393575103.

Adding to 102004247 its reverse (742400201), we get a palindrome (844404448).

The spelling of 102004247 in words is "one hundred two million, four thousand, two hundred forty-seven".