2101525 has 6 divisors (see below), whose sum is σ = 2605922. Its totient is φ = 1681200.

The previous prime is 2101513. The next prime is 2101531. The reversal of 2101525 is 5251012.

It can be written as a sum of positive squares in 3 ways, for example, as 10609 + 2090916 = 103^2 + 1446^2 .

It is not a de Polignac number, because 2101525 - 2¹¹ = 2099477 is a prime.

It is a Duffinian number.

2101525 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2101499 and 2101508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42006 + ... + 42055.

2^2101525 is an apocalyptic number.

2101525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2101525 is a deficient number, since it is larger than the sum of its proper divisors (504397).

2101525 is an equidigital number, since it uses as much as digits as its factorization.

2101525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84071 (or 84066 counting only the distinct ones).

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

The square root of 2101525 is about 1449.6637541168. The cubic root of 2101525 is about 128.0889071447.

Adding to 2101525 its reverse (5251012), we get a palindrome (7352537).

The spelling of 2101525 in words is "two million, one hundred one thousand, five hundred twenty-five".