1340002021 has 8 divisors (see below), whose sum is σ = 1368161280. Its totient is φ = 1311949392.

The previous prime is 1340002003. The next prime is 1340002039. The reversal of 1340002021 is 1202000431.

It is an interprime number because it is at equal distance from previous prime (1340002003) and next prime (1340002039).

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 1340002021 - 2²⁵ = 1306447589 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1340001992 and 1340002010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340002061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1005 + ... + 51778.

It is an arithmetic number, because the mean of its divisors is an integer number (171020160).

Almost surely, 2^1340002021 is an apocalyptic number.

It is an amenable number.

1340002021 is a deficient number, since it is larger than the sum of its proper divisors (28159259).

1340002021 is an equidigital number, since it uses as much as digits as its factorization.

1340002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53315.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1340002021 is about 36606.0380401922. The cubic root of 1340002021 is about 1102.4743257031.

Adding to 1340002021 its reverse (1202000431), we get a palindrome (2542002452).

The spelling of 1340002021 in words is "one billion, three hundred forty million, two thousand, twenty-one".