1340441221 has 8 divisors (see below), whose sum is σ = 1536350400. Its totient is φ = 1145636448.

The previous prime is 1340441213. The next prime is 1340441227. The reversal of 1340441221 is 1221440431.

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 1340441221 - 2³ = 1340441213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1340441192 and 1340441201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340441227) 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, 273496 + ... + 278353.

It is an arithmetic number, because the mean of its divisors is an integer number (192043800).

Almost surely, 2^1340441221 is an apocalyptic number.

It is an amenable number.

1340441221 is a deficient number, since it is larger than the sum of its proper divisors (195909179).

1340441221 is an equidigital number, since it uses as much as digits as its factorization.

1340441221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552203.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1340441221 is about 36612.0365590334. The cubic root of 1340441221 is about 1102.5947617981.

Adding to 1340441221 its reverse (1221440431), we get a palindrome (2561881652).

The spelling of 1340441221 in words is "one billion, three hundred forty million, four hundred forty-one thousand, two hundred twenty-one".