4245749 has 4 divisors (see below), whose sum is σ = 4283436. Its totient is φ = 4208064.

The previous prime is 4245743. The next prime is 4245779. The reversal of 4245749 is 9475424.

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 2010724 + 2235025 = 1418^2 + 1495^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4245749 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4245743) 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, 18674 + ... + 18899.

It is an arithmetic number, because the mean of its divisors is an integer number (1070859).

Almost surely, 2^4245749 is an apocalyptic number.

It is an amenable number.

4245749 is a deficient number, since it is larger than the sum of its proper divisors (37687).

4245749 is a wasteful number, since it uses less digits than its factorization.

4245749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37686.

The product of its digits is 40320, while the sum is 35.

The square root of 4245749 is about 2060.5215359224. The cubic root of 4245749 is about 161.9265658132.

It can be divided in two parts, 4245 and 749, that added together give a palindrome (4994).

The spelling of 4245749 in words is "four million, two hundred forty-five thousand, seven hundred forty-nine".