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4221000 = 233253767
BaseRepresentation
bin10000000110100001001000
321221110010100
4100012201020
52040033000
6230245400
750610060
oct20064110
97843110
104221000
112423333
1214b6860
13b4a344
147bc3a0
15585a00
hex406848

4221000 has 192 divisors, whose sum is σ = 16548480. Its totient is φ = 950400.

The previous prime is 4220987. The next prime is 4221011. The reversal of 4221000 is 1224.

4221000 = T181 + T182 + ... + T314.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an Ulam number.

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 62967 + ... + 63033.

It is an arithmetic number, because the mean of its divisors is an integer number (86190).

Almost surely, 24221000 is an apocalyptic number.

4221000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4221000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8274240).

4221000 is an abundant number, since it is smaller than the sum of its proper divisors (12327480).

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

4221000 is a wasteful number, since it uses less digits than its factorization.

4221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 4221000 is about 2054.5072401917. The cubic root of 4221000 is about 161.6113224430.

Adding to 4221000 its reverse (1224), we get a palindrome (4222224).

The spelling of 4221000 in words is "four million, two hundred twenty-one thousand".