4091229 has 20 divisors (see below), whose sum is σ = 6233436. Its totient is φ = 2673216.

The previous prime is 4091177. The next prime is 4091239. The reversal of 4091229 is 9221904.

It can be written as a sum of positive squares in 2 ways, for example, as 2340900 + 1750329 = 1530^2 + 1323^2 .

It is not a de Polignac number, because 4091229 - 2⁸ = 4090973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4091239) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3817 + ... + 4769.

Almost surely, 2^4091229 is an apocalyptic number.

It is an amenable number.

4091229 is a deficient number, since it is larger than the sum of its proper divisors (2142207).

4091229 is an equidigital number, since it uses as much as digits as its factorization.

4091229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018 (or 1009 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 4091229 is about 2022.6786694876. The cubic root of 4091229 is about 159.9378534686.

The spelling of 4091229 in words is "four million, ninety-one thousand, two hundred twenty-nine".