4220454 has 64 divisors (see below), whose sum is σ = 10699776. Its totient is φ = 1081344.

The previous prime is 4220449. The next prime is 4220473. The reversal of 4220454 is 4540224.

It is a super-2 number, since 2×4220454² = 35624463932232, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 4220454.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16294 + ... + 16550.

It is an arithmetic number, because the mean of its divisors is an integer number (167184).

Almost surely, 2^4220454 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4220454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5349888).

4220454 is an abundant number, since it is smaller than the sum of its proper divisors (6479322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4220454 is a wasteful number, since it uses less digits than its factorization.

4220454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 4220454 is about 2054.3743573166. The cubic root of 4220454 is about 161.6043538268.

Adding to 4220454 its reverse (4540224), we get a palindrome (8760678).

The spelling of 4220454 in words is "four million, two hundred twenty thousand, four hundred fifty-four".