1201143 has 4 divisors (see below), whose sum is σ = 1601528. Its totient is φ = 800760.

The previous prime is 1201141. The next prime is 1201153. The reversal of 1201143 is 3411021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3411021 = 3 ⋅1137007.

It is not a de Polignac number, because 1201143 - 2¹ = 1201141 is a prime.

It is a D-number.

It is a Duffinian number.

1201143 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200188 + ... + 200193.

It is an arithmetic number, because the mean of its divisors is an integer number (400382).

2^1201143 is an apocalyptic number.

1201143 is a deficient number, since it is larger than the sum of its proper divisors (400385).

1201143 is an equidigital number, since it uses as much as digits as its factorization.

1201143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400384.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1201143 is about 1095.9666965743. The cubic root of 1201143 is about 106.2995856212.

Adding to 1201143 its reverse (3411021), we get a palindrome (4612164).

The spelling of 1201143 in words is "one million, two hundred one thousand, one hundred forty-three".