4220745 has 16 divisors (see below), whose sum is σ = 6918912. Its totient is φ = 2195840.

The previous prime is 4220731. The next prime is 4220767. The reversal of 4220745 is 5470224.

It is not a de Polignac number, because 4220745 - 2⁴ = 4220729 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2817 + ... + 4046.

It is an arithmetic number, because the mean of its divisors is an integer number (432432).

Almost surely, 2^4220745 is an apocalyptic number.

It is an amenable number.

4220745 is a deficient number, since it is larger than the sum of its proper divisors (2698167).

4220745 is a wasteful number, since it uses less digits than its factorization.

4220745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6912.

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 4220745 is about 2054.4451805780. The cubic root of 4220745 is about 161.6080679443.

Adding to 4220745 its reverse (5470224), we get a palindrome (9690969).

The spelling of 4220745 in words is "four million, two hundred twenty thousand, seven hundred forty-five".