102342805 has 16 divisors (see below), whose sum is σ = 130880880. Its totient is φ = 76557312.

The previous prime is 102342763. The next prime is 102342809. The reversal of 102342805 is 508243201.

It can be written as a sum of positive squares in 8 ways, for example, as 6185169 + 96157636 = 2487^2 + 9806^2 .

It is a cyclic number.

It is not a de Polignac number, because 102342805 - 2⁷ = 102342677 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102342805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102342809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9511 + ... + 17179.

It is an arithmetic number, because the mean of its divisors is an integer number (8180055).

Almost surely, 2^102342805 is an apocalyptic number.

It is an amenable number.

102342805 is a deficient number, since it is larger than the sum of its proper divisors (28538075).

102342805 is a wasteful number, since it uses less digits than its factorization.

102342805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7848.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 102342805 is about 10116.4620792054. The cubic root of 102342805 is about 467.7557181448.

The spelling of 102342805 in words is "one hundred two million, three hundred forty-two thousand, eight hundred five".