4122521 has 8 divisors (see below), whose sum is σ = 4457544. Its totient is φ = 3790080.

The previous prime is 4122493. The next prime is 4122557. The reversal of 4122521 is 1252214.

It can be written as a sum of positive squares in 4 ways, for example, as 78400 + 4044121 = 280^2 + 2011^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4122521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4122521.

It is not an unprimeable number, because it can be changed into a prime (4122571) 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, 3911 + ... + 4851.

It is an arithmetic number, because the mean of its divisors is an integer number (557193).

Almost surely, 2^4122521 is an apocalyptic number.

It is an amenable number.

4122521 is a deficient number, since it is larger than the sum of its proper divisors (335023).

4122521 is a wasteful number, since it uses less digits than its factorization.

4122521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291.

The product of its digits is 160, while the sum is 17.

The square root of 4122521 is about 2030.3992218281. The cubic root of 4122521 is about 160.3445828796.

Adding to 4122521 its reverse (1252214), we get a palindrome (5374735).

The spelling of 4122521 in words is "four million, one hundred twenty-two thousand, five hundred twenty-one".