2102905 has 8 divisors (see below), whose sum is σ = 2884032. Its totient is φ = 1441968.

The previous prime is 2102897. The next prime is 2102927. The reversal of 2102905 is 5092012.

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 2102905 - 2³ = 2102897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30007 + ... + 30076.

It is an arithmetic number, because the mean of its divisors is an integer number (360504).

2^2102905 is an apocalyptic number.

It is an amenable number.

2102905 is a deficient number, since it is larger than the sum of its proper divisors (781127).

2102905 is an equidigital number, since it uses as much as digits as its factorization.

2102905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60095.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 2102905 is about 1450.1396484477. The cubic root of 2102905 is about 128.1169382197.

Adding to 2102905 its reverse (5092012), we get a palindrome (7194917).

The spelling of 2102905 in words is "two million, one hundred two thousand, nine hundred five".