4221658 has 16 divisors (see below), whose sum is σ = 7288704. Its totient is φ = 1796400.

The previous prime is 4221653. The next prime is 4221671. The reversal of 4221658 is 8561224.

It is a d-powerful number, because it can be written as 4 + 2¹⁴ + 2²² + 1 + 6⁵ + 5⁵ + 8² .

It is not an unprimeable number, because it can be changed into a prime (4221653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1116 + ... + 3112.

It is an arithmetic number, because the mean of its divisors is an integer number (455544).

Almost surely, 2^4221658 is an apocalyptic number.

4221658 is a deficient number, since it is larger than the sum of its proper divisors (3067046).

4221658 is a wasteful number, since it uses less digits than its factorization.

4221658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2157.

The product of its digits is 3840, while the sum is 28.

The square root of 4221658 is about 2054.6673696733. The cubic root of 4221658 is about 161.6197197205.

It can be divided in two parts, 422 and 1658, that added together give a triangular number (2080 = T₆₄).

The spelling of 4221658 in words is "four million, two hundred twenty-one thousand, six hundred fifty-eight".