2152105 has 8 divisors (see below), whose sum is σ = 2652552. Its totient is φ = 1675008.

The previous prime is 2152103. The next prime is 2152123. The reversal of 2152105 is 5012512.

It can be written as a sum of positive squares in 4 ways, for example, as 769129 + 1382976 = 877^2 + 1176^2 .

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 2152105 - 2¹ = 2152103 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2152103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5632 + ... + 6001.

It is an arithmetic number, because the mean of its divisors is an integer number (331569).

2^2152105 is an apocalyptic number.

It is an amenable number.

2152105 is a deficient number, since it is larger than the sum of its proper divisors (500447).

2152105 is a wasteful number, since it uses less digits than its factorization.

2152105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11675.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 2152105 is about 1467.0054532959. The cubic root of 2152105 is about 129.1083959618.

Subtracting from 2152105 its sum of digits (16), we obtain a square (2152089 = 1467²).

Adding to 2152105 its reverse (5012512), we get a palindrome (7164617).

The spelling of 2152105 in words is "two million, one hundred fifty-two thousand, one hundred five".