2105501 has 4 divisors (see below), whose sum is σ = 2229372. Its totient is φ = 1981632.

The previous prime is 2105497. The next prime is 2105503. The reversal of 2105501 is 1055012.

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 1651225 + 454276 = 1285^2 + 674^2 .

It is a cyclic number.

It is not a de Polignac number, because 2105501 - 2² = 2105497 is a prime.

It is a super-2 number, since 2×2105501² = 8866268922002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61910 + ... + 61943.

It is an arithmetic number, because the mean of its divisors is an integer number (557343).

2^2105501 is an apocalyptic number.

It is an amenable number.

2105501 is a deficient number, since it is larger than the sum of its proper divisors (123871).

2105501 is a wasteful number, since it uses less digits than its factorization.

2105501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123870.

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 2105501 is about 1451.0344585846. The cubic root of 2105501 is about 128.1696359253.

The spelling of 2105501 in words is "two million, one hundred five thousand, five hundred one".