1139203 has 4 divisors (see below), whose sum is σ = 1226848. Its totient is φ = 1051560.

The previous prime is 1139197. The next prime is 1139227. The reversal of 1139203 is 3029311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3029311 = 29 ⋅104459.

It is a cyclic number.

It is not a de Polignac number, because 1139203 - 2¹⁷ = 1008131 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1139263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43803 + ... + 43828.

It is an arithmetic number, because the mean of its divisors is an integer number (306712).

2^1139203 is an apocalyptic number.

1139203 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1139203 is a deficient number, since it is larger than the sum of its proper divisors (87645).

1139203 is an equidigital number, since it uses as much as digits as its factorization.

1139203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87644.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 1139203 is about 1067.3345305011. The cubic root of 1139203 is about 104.4400425270.

It can be divided in two parts, 113 and 9203, that added together give a triangular number (9316 = T₁₃₆).

The spelling of 1139203 in words is "one million, one hundred thirty-nine thousand, two hundred three".