2102305 has 8 divisors (see below), whose sum is σ = 2671272. Its totient is φ = 1582848.

The previous prime is 2102291. The next prime is 2102311. The reversal of 2102305 is 5032012.

2102305 = 454² + 455² + ... + 463².

It can be written as a sum of positive squares in 4 ways, for example, as 74529 + 2027776 = 273^2 + 1424^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2102305 - 2⁵ = 2102273 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12282 + ... + 12451.

It is an arithmetic number, because the mean of its divisors is an integer number (333909).

2^2102305 is an apocalyptic number.

It is an amenable number.

2102305 is a deficient number, since it is larger than the sum of its proper divisors (568967).

2102305 is a wasteful number, since it uses less digits than its factorization.

2102305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24755.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 2102305 is about 1449.9327570615. The cubic root of 2102305 is about 128.1047523031.

Adding to 2102305 its reverse (5032012), we get a palindrome (7134317).

The spelling of 2102305 in words is "two million, one hundred two thousand, three hundred five".