2122521 has 8 divisors (see below), whose sum is σ = 2857920. Its totient is φ = 1401072.

The previous prime is 2122513. The next prime is 2122531. The reversal of 2122521 is 1252212.

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

It is not a de Polignac number, because 2122521 - 2³ = 2122513 is a prime.

2122521 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2122521.

It is not an unprimeable number, because it can be changed into a prime (2122511) 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, 3126 + ... + 3743.

It is an arithmetic number, because the mean of its divisors is an integer number (357240).

2^2122521 is an apocalyptic number.

It is an amenable number.

2122521 is a deficient number, since it is larger than the sum of its proper divisors (735399).

2122521 is a wasteful number, since it uses less digits than its factorization.

2122521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6975.

The product of its digits is 80, while the sum is 15.

The square root of 2122521 is about 1456.8874355969. The cubic root of 2122521 is about 128.5140662987.

Adding to 2122521 its reverse (1252212), we get a palindrome (3374733).

The spelling of 2122521 in words is "two million, one hundred twenty-two thousand, five hundred twenty-one".