102205487 has 4 divisors (see below), whose sum is σ = 102385680. Its totient is φ = 102025296.

The previous prime is 102205457. The next prime is 102205489. The reversal of 102205487 is 784502201.

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 102205487 - 2¹² = 102201391 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 (102205489) 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, 89243 + ... + 90380.

It is an arithmetic number, because the mean of its divisors is an integer number (25596420).

Almost surely, 2^102205487 is an apocalyptic number.

102205487 is a deficient number, since it is larger than the sum of its proper divisors (180193).

102205487 is an equidigital number, since it uses as much as digits as its factorization.

102205487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180192.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 102205487 is about 10109.6729422865. The cubic root of 102205487 is about 467.5464214629.

Adding to 102205487 its reverse (784502201), we get a palindrome (886707688).

The spelling of 102205487 in words is "one hundred two million, two hundred five thousand, four hundred eighty-seven".