1340034221 has 2 divisors, whose sum is σ = 1340034222. Its totient is φ = 1340034220.

The previous prime is 1340034193. The next prime is 1340034229. The reversal of 1340034221 is 1224300431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1063477321 + 276556900 = 32611^2 + 16630^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340034221 - 2²² = 1335839917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1340034193 and 1340034202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340034229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670017110 + 670017111.

It is an arithmetic number, because the mean of its divisors is an integer number (670017111).

Almost surely, 2^1340034221 is an apocalyptic number.

It is an amenable number.

1340034221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340034221 is an equidigital number, since it uses as much as digits as its factorization.

1340034221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1340034221 is about 36606.4778557020. The cubic root of 1340034221 is about 1102.4831563835.

Adding to 1340034221 its reverse (1224300431), we get a palindrome (2564334652).

The spelling of 1340034221 in words is "one billion, three hundred forty million, thirty-four thousand, two hundred twenty-one".