4219729 has 6 divisors (see below), whose sum is σ = 4453890. Its totient is φ = 3997296.

The previous prime is 4219711. The next prime is 4219753. The reversal of 4219729 is 9279124.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4210704 + 9025 = 2052^2 + 95^2 .

It is not a de Polignac number, because 4219729 - 2⁵ = 4219697 is a prime.

It is a super-2 number, since 2×4219729² = 35612225666882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4219694 and 4219703.

It is not an unprimeable number, because it can be changed into a prime (4219769) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5484 + ... + 6205.

It is an arithmetic number, because the mean of its divisors is an integer number (742315).

Almost surely, 2^4219729 is an apocalyptic number.

It is an amenable number.

4219729 is a deficient number, since it is larger than the sum of its proper divisors (234161).

4219729 is a wasteful number, since it uses less digits than its factorization.

4219729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11727 (or 11708 counting only the distinct ones).

The product of its digits is 9072, while the sum is 34.

The square root of 4219729 is about 2054.1978969905. The cubic root of 4219729 is about 161.5950996986.

The spelling of 4219729 in words is "four million, two hundred nineteen thousand, seven hundred twenty-nine".