1340721230 has 8 divisors (see below), whose sum is σ = 2413298232. Its totient is φ = 536288488.

The previous prime is 1340721211. The next prime is 1340721241. The reversal of 1340721230 is 321270431.

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

It is a junction number, because it is equal to n+sod(n) for n = 1340721196 and 1340721205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67036052 + ... + 67036071.

It is an arithmetic number, because the mean of its divisors is an integer number (301662279).

Almost surely, 2^1340721230 is an apocalyptic number.

1340721230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1340721230 is a deficient number, since it is larger than the sum of its proper divisors (1072577002).

1340721230 is a wasteful number, since it uses less digits than its factorization.

1340721230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134072130.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 1340721230 is about 36615.8603613243. The cubic root of 1340721230 is about 1102.6715312868.

Adding to 1340721230 its reverse (321270431), we get a palindrome (1661991661).

The spelling of 1340721230 in words is "one billion, three hundred forty million, seven hundred twenty-one thousand, two hundred thirty".