2123105 has 8 divisors (see below), whose sum is σ = 2589864. Its totient is φ = 1670400.

The previous prime is 2123087. The next prime is 2123123. The reversal of 2123105 is 5013212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2123087) and next prime (2123123).

It can be written as a sum of positive squares in 4 ways, for example, as 61009 + 2062096 = 247^2 + 1436^2 .

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

It is not a de Polignac number, because 2123105 - 2¹⁶ = 2057569 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2123105.

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, 3176 + ... + 3785.

It is an arithmetic number, because the mean of its divisors is an integer number (323733).

2^2123105 is an apocalyptic number.

It is an amenable number.

2123105 is a deficient number, since it is larger than the sum of its proper divisors (466759).

2123105 is an equidigital number, since it uses as much as digits as its factorization.

2123105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7027.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 2123105 is about 1457.0878491018. The cubic root of 2123105 is about 128.5258518644.

Adding to 2123105 its reverse (5013212), we get a palindrome (7136317).

The spelling of 2123105 in words is "two million, one hundred twenty-three thousand, one hundred five".