1240123 has 4 divisors (see below), whose sum is σ = 1242360. Its totient is φ = 1237888.

The previous prime is 1240117. The next prime is 1240139. The reversal of 1240123 is 3210421.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3210421 = 443 ⋅7247.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1240123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240153) 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, 411 + ... + 1627.

It is an arithmetic number, because the mean of its divisors is an integer number (310590).

2^1240123 is an apocalyptic number.

1240123 is a deficient number, since it is larger than the sum of its proper divisors (2237).

1240123 is a wasteful number, since it uses less digits than its factorization.

1240123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2236.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1240123 is about 1113.6080998269. The cubic root of 1240123 is about 107.4372592250.

Adding to 1240123 its reverse (3210421), we get a palindrome (4450544).

The spelling of 1240123 in words is "one million, two hundred forty thousand, one hundred twenty-three".