1341355021 has 2 divisors, whose sum is σ = 1341355022. Its totient is φ = 1341355020.

The previous prime is 1341355013. The next prime is 1341355039. The reversal of 1341355021 is 1205531431.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1109889225 + 231465796 = 33315^2 + 15214^2 .

It is a cyclic number.

It is not a de Polignac number, because 1341355021 - 2³ = 1341355013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1341355051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670677510 + 670677511.

It is an arithmetic number, because the mean of its divisors is an integer number (670677511).

Almost surely, 2^1341355021 is an apocalyptic number.

It is an amenable number.

1341355021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1341355021 is an equidigital number, since it uses as much as digits as its factorization.

1341355021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1341355021 is about 36624.5139353412. The cubic root of 1341355021 is about 1102.8452569857.

Adding to 1341355021 its reverse (1205531431), we get a palindrome (2546886452).

The spelling of 1341355021 in words is "one billion, three hundred forty-one million, three hundred fifty-five thousand, twenty-one".