4243013 has 4 divisors (see below), whose sum is σ = 4492620. Its totient is φ = 3993408.

The previous prime is 4243009. The next prime is 4243039. The reversal of 4243013 is 3103424.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2505889 + 1737124 = 1583^2 + 1318^2 .

It is a cyclic number.

It is not a de Polignac number, because 4243013 - 2² = 4243009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 249589 = 4243013 / (4 + 2 + 4 + 3 + 0 + 1 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4242982 and 4243000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4243003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124778 + ... + 124811.

It is an arithmetic number, because the mean of its divisors is an integer number (1123155).

Almost surely, 2^4243013 is an apocalyptic number.

It is an amenable number.

4243013 is a deficient number, since it is larger than the sum of its proper divisors (249607).

4243013 is a wasteful number, since it uses less digits than its factorization.

4243013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249606.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 4243013 is about 2059.8575193445. The cubic root of 4243013 is about 161.8917760126.

Adding to 4243013 its reverse (3103424), we get a palindrome (7346437).

The spelling of 4243013 in words is "four million, two hundred forty-three thousand, thirteen".