1143398 has 4 divisors (see below), whose sum is σ = 1715100. Its totient is φ = 571698.

The previous prime is 1143391. The next prime is 1143407. The reversal of 1143398 is 8933411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8933411 = 2819 ⋅3169.

It is an Ulam number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1143398.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 285848 + ... + 285851.

It is an arithmetic number, because the mean of its divisors is an integer number (428775).

2^1143398 is an apocalyptic number.

1143398 is a deficient number, since it is larger than the sum of its proper divisors (571702).

1143398 is an equidigital number, since it uses as much as digits as its factorization.

1143398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571701.

The product of its digits is 2592, while the sum is 29.

The square root of 1143398 is about 1069.2979004936. The cubic root of 1143398 is about 104.5680821274.

The spelling of 1143398 in words is "one million, one hundred forty-three thousand, three hundred ninety-eight".