1340123 has 4 divisors (see below), whose sum is σ = 1342440. Its totient is φ = 1337808.

The previous prime is 1340113. The next prime is 1340149. The reversal of 1340123 is 3210431.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1340123 - 2⁴ = 1340107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1340098 and 1340107.

It is not an unprimeable number, because it can be changed into a prime (1340113) 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, 536 + ... + 1722.

It is an arithmetic number, because the mean of its divisors is an integer number (335610).

2^1340123 is an apocalyptic number.

1340123 is a deficient number, since it is larger than the sum of its proper divisors (2317).

1340123 is a wasteful number, since it uses less digits than its factorization.

1340123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2316.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1340123 is about 1157.6368169681. The cubic root of 1340123 is about 110.2507502824.

Adding to 1340123 its reverse (3210431), we get a palindrome (4550554).

The spelling of 1340123 in words is "one million, three hundred forty thousand, one hundred twenty-three".