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4420021 = 47157599
BaseRepresentation
bin10000110111000110110101
322022120010111
4100313012311
52112420041
6234423021
752366234
oct20670665
98276114
104420021
112549911
121591a71
13bb9ac8
14830b1b
155c4981
hex4371b5

4420021 has 8 divisors (see below), whose sum is σ = 4550400. Its totient is φ = 4291248.

The previous prime is 4420019. The next prime is 4420037. The reversal of 4420021 is 1200244.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4420021 - 21 = 4420019 is a prime.

It is a Duffinian number.

4420021 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 4419983 and 4420010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4420001) 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, 7080 + ... + 7678.

It is an arithmetic number, because the mean of its divisors is an integer number (568800).

Almost surely, 24420021 is an apocalyptic number.

It is an amenable number.

4420021 is a deficient number, since it is larger than the sum of its proper divisors (130379).

4420021 is a wasteful number, since it uses less digits than its factorization.

4420021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 4420021 is about 2102.3845984976. The cubic root of 4420021 is about 164.1124179653.

Adding to 4420021 its reverse (1200244), we get a palindrome (5620265).

The spelling of 4420021 in words is "four million, four hundred twenty thousand, twenty-one".

Divisors: 1 47 157 599 7379 28153 94043 4420021