4220749 has 4 divisors (see below), whose sum is σ = 4545436. Its totient is φ = 3896064.

The previous prime is 4220731. The next prime is 4220767. The reversal of 4220749 is 9470224.

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

It is an interprime number because it is at equal distance from previous prime (4220731) and next prime (4220767).

It can be written as a sum of positive squares in 2 ways, for example, as 1087849 + 3132900 = 1043^2 + 1770^2 .

It is a cyclic number.

It is not a de Polignac number, because 4220749 - 2¹¹ = 4218701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4220719) 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, 162324 + ... + 162349.

It is an arithmetic number, because the mean of its divisors is an integer number (1136359).

Almost surely, 2^4220749 is an apocalyptic number.

It is an amenable number.

4220749 is a deficient number, since it is larger than the sum of its proper divisors (324687).

4220749 is a wasteful number, since it uses less digits than its factorization.

4220749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324686.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 4220749 is about 2054.4461540766. The cubic root of 4220749 is about 161.6081189962.

The spelling of 4220749 in words is "four million, two hundred twenty thousand, seven hundred forty-nine".