1899229 has 4 divisors (see below), whose sum is σ = 1911484. Its totient is φ = 1886976.

The previous prime is 1899199. The next prime is 1899253. The reversal of 1899229 is 9229981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9229981 = 1223 ⋅7547.

It can be written as a sum of positive squares in 2 ways, for example, as 248004 + 1651225 = 498^2 + 1285^2 .

It is a cyclic number.

It is not a de Polignac number, because 1899229 - 2⁵ = 1899197 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a zygodrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 1899191 and 1899200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1899929) 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, 5892 + ... + 6205.

It is an arithmetic number, because the mean of its divisors is an integer number (477871).

2^1899229 is an apocalyptic number.

It is an amenable number.

1899229 is a deficient number, since it is larger than the sum of its proper divisors (12255).

1899229 is a wasteful number, since it uses less digits than its factorization.

1899229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12254.

The product of its digits is 23328, while the sum is 40.

The square root of 1899229 is about 1378.1251757370. The cubic root of 1899229 is about 123.8394775112.

The spelling of 1899229 in words is "one million, eight hundred ninety-nine thousand, two hundred twenty-nine".