1898143 has 4 divisors (see below), whose sum is σ = 2044168. Its totient is φ = 1752120.

The previous prime is 1898131. The next prime is 1898153. The reversal of 1898143 is 3418981.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1898143 - 2¹⁷ = 1767071 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

1898143 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1898099 and 1898108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1898123) 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, 72993 + ... + 73018.

It is an arithmetic number, because the mean of its divisors is an integer number (511042).

2^1898143 is an apocalyptic number.

1898143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1898143 is a deficient number, since it is larger than the sum of its proper divisors (146025).

1898143 is a wasteful number, since it uses less digits than its factorization.

1898143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146024.

The product of its digits is 6912, while the sum is 34.

The square root of 1898143 is about 1377.7311058403. The cubic root of 1898143 is about 123.8158687530.

The spelling of 1898143 in words is "one million, eight hundred ninety-eight thousand, one hundred forty-three".