4047229 has 4 divisors (see below), whose sum is σ = 4051260. Its totient is φ = 4043200.

The previous prime is 4047157. The next prime is 4047257. The reversal of 4047229 is 9227404.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 643204 + 3404025 = 802^2 + 1845^2 .

It is a cyclic number.

It is not a de Polignac number, because 4047229 - 2⁷ = 4047101 is a prime.

It is a Duffinian number.

4047229 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 4047197 and 4047206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4047299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 837 + ... + 2965.

It is an arithmetic number, because the mean of its divisors is an integer number (1012815).

Almost surely, 2^4047229 is an apocalyptic number.

It is an amenable number.

4047229 is a deficient number, since it is larger than the sum of its proper divisors (4031).

4047229 is a wasteful number, since it uses less digits than its factorization.

4047229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4030.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 4047229 is about 2011.7726014637. The cubic root of 4047229 is about 159.3624236648.

The spelling of 4047229 in words is "four million, forty-seven thousand, two hundred twenty-nine".