1340030021 has 8 divisors (see below), whose sum is σ = 1471533888. Its totient is φ = 1210140000.

The previous prime is 1340029991. The next prime is 1340030039. The reversal of 1340030021 is 1200300431.

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 1340030021 - 2¹⁰ = 1340028997 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1340029978 and 1340030005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340033021) 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, 401720 + ... + 405041.

It is an arithmetic number, because the mean of its divisors is an integer number (183941736).

Almost surely, 2^1340030021 is an apocalyptic number.

1340030021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1340030021 is a deficient number, since it is larger than the sum of its proper divisors (131503867).

1340030021 is a wasteful number, since it uses less digits than its factorization.

1340030021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806923.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1340030021 is about 36606.4204887613. The cubic root of 1340030021 is about 1102.4820045636.

Adding to 1340030021 its reverse (1200300431), we get a palindrome (2540330452).

The spelling of 1340030021 in words is "one billion, three hundred forty million, thirty thousand, twenty-one".