1240133423 has 4 divisors (see below), whose sum is σ = 1248032520. Its totient is φ = 1232234328.

The previous prime is 1240133383. The next prime is 1240133441. The reversal of 1240133423 is 3243310421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3243310421 = 13 ⋅249485417.

It is a cyclic number.

It is not a de Polignac number, because 1240133423 - 2⁶ = 1240133359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240133443) 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, 3949313 + ... + 3949626.

It is an arithmetic number, because the mean of its divisors is an integer number (312008130).

Almost surely, 2^1240133423 is an apocalyptic number.

1240133423 is a deficient number, since it is larger than the sum of its proper divisors (7899097).

1240133423 is an equidigital number, since it uses as much as digits as its factorization.

1240133423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7899096.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1240133423 is about 35215.5281516549. The cubic root of 1240133423 is about 1074.3756022078.

Adding to 1240133423 its reverse (3243310421), we get a palindrome (4483443844).

The spelling of 1240133423 in words is "one billion, two hundred forty million, one hundred thirty-three thousand, four hundred twenty-three".