102446405 has 4 divisors (see below), whose sum is σ = 122935692. Its totient is φ = 81957120.

The previous prime is 102446381. The next prime is 102446411. The reversal of 102446405 is 504644201.

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

It can be written as a sum of positive squares in 2 ways, for example, as 56220004 + 46226401 = 7498^2 + 6799^2 .

It is not a de Polignac number, because 102446405 - 2²² = 98252101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 10244636 + ... + 10244645.

It is an arithmetic number, because the mean of its divisors is an integer number (30733923).

Almost surely, 2^102446405 is an apocalyptic number.

It is an amenable number.

102446405 is a deficient number, since it is larger than the sum of its proper divisors (20489287).

102446405 is an equidigital number, since it uses as much as digits as its factorization.

102446405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20489286.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 102446405 is about 10121.5811511838. The cubic root of 102446405 is about 467.9134988179.

The spelling of 102446405 in words is "one hundred two million, four hundred forty-six thousand, four hundred five".