1340212423 has 4 divisors (see below), whose sum is σ = 1462049928. Its totient is φ = 1218374920.

The previous prime is 1340212421. The next prime is 1340212441. The reversal of 1340212423 is 3242120431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1340212423 - 2¹ = 1340212421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1340212394 and 1340212403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340212421) 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, 60918736 + ... + 60918757.

It is an arithmetic number, because the mean of its divisors is an integer number (365512482).

Almost surely, 2^1340212423 is an apocalyptic number.

1340212423 is a deficient number, since it is larger than the sum of its proper divisors (121837505).

1340212423 is a wasteful number, since it uses less digits than its factorization.

1340212423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121837504.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1340212423 is about 36608.9117975391. The cubic root of 1340212423 is about 1102.5320247861.

Adding to 1340212423 its reverse (3242120431), we get a palindrome (4582332854).

The spelling of 1340212423 in words is "one billion, three hundred forty million, two hundred twelve thousand, four hundred twenty-three".