1140023 has 4 divisors (see below), whose sum is σ = 1142208. Its totient is φ = 1137840.

The previous prime is 1139993. The next prime is 1140091. The reversal of 1140023 is 3200411.

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: 3200411 = 29 ⋅110359.

It is a cyclic number.

It is not a de Polignac number, because 1140023 - 2⁶ = 1139959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1139986 and 1140013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203 + ... + 1523.

It is an arithmetic number, because the mean of its divisors is an integer number (285552).

2^1140023 is an apocalyptic number.

1140023 is a deficient number, since it is larger than the sum of its proper divisors (2185).

1140023 is an equidigital number, since it uses as much as digits as its factorization.

1140023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2184.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1140023 is about 1067.7185958856. The cubic root of 1140023 is about 104.4650952158.

Adding to 1140023 its reverse (3200411), we get a palindrome (4340434).

The spelling of 1140023 in words is "one million, one hundred forty thousand, twenty-three".