1352345021 has 2 divisors, whose sum is σ = 1352345022. Its totient is φ = 1352345020.

The previous prime is 1352345011. The next prime is 1352345047. The reversal of 1352345021 is 1205432531.

It is a happy number.

It is an a-pointer prime, because the next prime (1352345047) can be obtained adding 1352345021 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 798684121 + 553660900 = 28261^2 + 23530^2 .

It is a cyclic number.

It is not a de Polignac number, because 1352345021 - 2⁶ = 1352344957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1352345011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 676172510 + 676172511.

It is an arithmetic number, because the mean of its divisors is an integer number (676172511).

Almost surely, 2^1352345021 is an apocalyptic number.

It is an amenable number.

1352345021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1352345021 is an equidigital number, since it uses as much as digits as its factorization.

1352345021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 1352345021 is about 36774.2439895098. The cubic root of 1352345021 is about 1105.8490150619.

Adding to 1352345021 its reverse (1205432531), we get a palindrome (2557777552).

The spelling of 1352345021 in words is "one billion, three hundred fifty-two million, three hundred forty-five thousand, twenty-one".