4221386 has 16 divisors (see below), whose sum is σ = 6858600. Its totient is φ = 1937088.

The previous prime is 4221379. The next prime is 4221407. The reversal of 4221386 is 6831224.

It can be written as a sum of positive squares in 4 ways, for example, as 3129361 + 1092025 = 1769^2 + 1045^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a d-powerful number, because it can be written as 4 + 2¹⁴ + 2²² + 1 + 3⁸ + 8⁴ + 6² .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5600 + ... + 6308.

Almost surely, 2^4221386 is an apocalyptic number.

4221386 is a deficient number, since it is larger than the sum of its proper divisors (2637214).

4221386 is a wasteful number, since it uses less digits than its factorization.

4221386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953.

The product of its digits is 2304, while the sum is 26.

The square root of 4221386 is about 2054.6011778445. The cubic root of 4221386 is about 161.6162486112.

The spelling of 4221386 in words is "four million, two hundred twenty-one thousand, three hundred eighty-six".