1240331423 has 4 divisors (see below), whose sum is σ = 1240402008. Its totient is φ = 1240260840.

The previous prime is 1240331401. The next prime is 1240331429. The reversal of 1240331423 is 3241330421.

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 a de Polignac number, because none of the positive numbers 2^k-1240331423 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 (1240331429) 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, 14228 + ... + 51798.

It is an arithmetic number, because the mean of its divisors is an integer number (310100502).

Almost surely, 2^1240331423 is an apocalyptic number.

1240331423 is a deficient number, since it is larger than the sum of its proper divisors (70585).

1240331423 is an equidigital number, since it uses as much as digits as its factorization.

1240331423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70584.

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

The square root of 1240331423 is about 35218.3392992912. The cubic root of 1240331423 is about 1074.4327775206.

Adding to 1240331423 its reverse (3241330421), we get a palindrome (4481661844).

The spelling of 1240331423 in words is "one billion, two hundred forty million, three hundred thirty-one thousand, four hundred twenty-three".