4221513 has 12 divisors (see below), whose sum is σ = 6131268. Its totient is φ = 2798880.

The previous prime is 4221499. The next prime is 4221521. The reversal of 4221513 is 3151224.

It can be written as a sum of positive squares in 2 ways, for example, as 1871424 + 2350089 = 1368^2 + 1533^2 .

It is not a de Polignac number, because 4221513 - 2⁶ = 4221449 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (4221533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 583 + ... + 2963.

It is an arithmetic number, because the mean of its divisors is an integer number (510939).

Almost surely, 2^4221513 is an apocalyptic number.

It is an amenable number.

4221513 is a deficient number, since it is larger than the sum of its proper divisors (1909755).

4221513 is a wasteful number, since it uses less digits than its factorization.

4221513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2584 (or 2581 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 4221513 is about 2054.6320838535. The cubic root of 4221513 is about 161.6178693315.

Adding to 4221513 its reverse (3151224), we get a palindrome (7372737).

The spelling of 4221513 in words is "four million, two hundred twenty-one thousand, five hundred thirteen".