4220249 has 4 divisors (see below), whose sum is σ = 4603920. Its totient is φ = 3836580.

The previous prime is 4220243. The next prime is 4220269. The reversal of 4220249 is 9420224.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-4220249 is a prime.

It is a d-powerful number, because it can be written as 4⁷ + 2⁷ + 2⁹ + 0 + 2¹³ + 4¹¹ + 9³ .

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4220243) 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, 191819 + ... + 191840.

It is an arithmetic number, because the mean of its divisors is an integer number (1150980).

Almost surely, 2^4220249 is an apocalyptic number.

It is an amenable number.

4220249 is a deficient number, since it is larger than the sum of its proper divisors (383671).

4220249 is a wasteful number, since it uses less digits than its factorization.

4220249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383670.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 4220249 is about 2054.3244631752. The cubic root of 4220249 is about 161.6017372497.

The spelling of 4220249 in words is "four million, two hundred twenty thousand, two hundred forty-nine".