2102521 has 8 divisors (see below), whose sum is σ = 2268000. Its totient is φ = 1942560.

The previous prime is 2102519. The next prime is 2102531. The reversal of 2102521 is 1252012.

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

It is not a de Polignac number, because 2102521 - 2¹ = 2102519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2102531) 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, 571 + ... + 2128.

It is an arithmetic number, because the mean of its divisors is an integer number (283500).

2^2102521 is an apocalyptic number.

It is an amenable number.

2102521 is a deficient number, since it is larger than the sum of its proper divisors (165479).

2102521 is a wasteful number, since it uses less digits than its factorization.

2102521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2759.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 2102521 is about 1450.0072413612. The cubic root of 2102521 is about 128.1091395001.

Adding to 2102521 its reverse (1252012), we get a palindrome (3354533).

The spelling of 2102521 in words is "two million, one hundred two thousand, five hundred twenty-one".