1123139 has 4 divisors (see below), whose sum is σ = 1189224. Its totient is φ = 1057056.

The previous prime is 1123127. The next prime is 1123151. The reversal of 1123139 is 9313211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9313211 = 19 ⋅490169.

It is an interprime number because it is at equal distance from previous prime (1123127) and next prime (1123151).

It is a cyclic number.

It is not a de Polignac number, because 1123139 - 2¹⁶ = 1057603 is a prime.

It is a super-2 number, since 2×1123139² = 2522882426642, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1123139.

It is not an unprimeable number, because it can be changed into a prime (1123189) 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, 33017 + ... + 33050.

It is an arithmetic number, because the mean of its divisors is an integer number (297306).

2^1123139 is an apocalyptic number.

1123139 is a deficient number, since it is larger than the sum of its proper divisors (66085).

1123139 is an equidigital number, since it uses as much as digits as its factorization.

1123139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66084.

The product of its digits is 162, while the sum is 20.

The square root of 1123139 is about 1059.7825248606. The cubic root of 1123139 is about 103.9468108196.

The spelling of 1123139 in words is "one million, one hundred twenty-three thousand, one hundred thirty-nine".