1340123241 has 4 divisors (see below), whose sum is σ = 1786830992. Its totient is φ = 893415492.

The previous prime is 1340123237. The next prime is 1340123261. The reversal of 1340123241 is 1423210431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1340123241 - 2² = 1340123237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1340123261) 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, 223353871 + ... + 223353876.

It is an arithmetic number, because the mean of its divisors is an integer number (446707748).

Almost surely, 2^1340123241 is an apocalyptic number.

It is an amenable number.

1340123241 is a deficient number, since it is larger than the sum of its proper divisors (446707751).

1340123241 is an equidigital number, since it uses as much as digits as its factorization.

1340123241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446707750.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1340123241 is about 36607.6937405240. The cubic root of 1340123241 is about 1102.5075689136.

Adding to 1340123241 its reverse (1423210431), we get a palindrome (2763333672).

The spelling of 1340123241 in words is "one billion, three hundred forty million, one hundred twenty-three thousand, two hundred forty-one".