1138523 has 8 divisors (see below), whose sum is σ = 1209600. Its totient is φ = 1069288.

The previous prime is 1138519. The next prime is 1138547. The reversal of 1138523 is 3258311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1138523 - 2² = 1138519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131523) 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 7 ways as a sum of consecutive naturals, for example, 938 + ... + 1776.

It is an arithmetic number, because the mean of its divisors is an integer number (151200).

2^1138523 is an apocalyptic number.

1138523 is a deficient number, since it is larger than the sum of its proper divisors (71077).

1138523 is an equidigital number, since it uses as much as digits as its factorization.

1138523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921.

The product of its digits is 720, while the sum is 23.

The square root of 1138523 is about 1067.0159324021. The cubic root of 1138523 is about 104.4192580065.

It can be divided in two parts, 1138 and 523, that added together give a palindrome (1661).

The spelling of 1138523 in words is "one million, one hundred thirty-eight thousand, five hundred twenty-three".