1340120023 has 8 divisors (see below), whose sum is σ = 1462594176. Its totient is φ = 1217753400.

The previous prime is 1340120009. The next prime is 1340120051. The reversal of 1340120023 is 3200210431.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1340120023 - 2⁹ = 1340119511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1340119979 and 1340120006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340120003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390 + ... + 51772.

It is an arithmetic number, because the mean of its divisors is an integer number (182824272).

Almost surely, 2^1340120023 is an apocalyptic number.

1340120023 is a deficient number, since it is larger than the sum of its proper divisors (122474153).

1340120023 is a wasteful number, since it uses less digits than its factorization.

1340120023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53765.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1340120023 is about 36607.6497879883. The cubic root of 1340120023 is about 1102.5066864395.

Adding to 1340120023 its reverse (3200210431), we get a palindrome (4540330454).

The spelling of 1340120023 in words is "one billion, three hundred forty million, one hundred twenty thousand, twenty-three".