1352530021 has 2 divisors, whose sum is σ = 1352530022. Its totient is φ = 1352530020.

The previous prime is 1352530009. The next prime is 1352530051. The reversal of 1352530021 is 1200352531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 723072100 + 629457921 = 26890^2 + 25089^2 .

It is a cyclic number.

It is not a de Polignac number, because 1352530021 - 2⁹ = 1352529509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1352529974 and 1352530001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1352530051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 676265010 + 676265011.

It is an arithmetic number, because the mean of its divisors is an integer number (676265011).

Almost surely, 2^1352530021 is an apocalyptic number.

It is an amenable number.

1352530021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1352530021 is an equidigital number, since it uses as much as digits as its factorization.

1352530021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 1352530021 is about 36776.7592509182. The cubic root of 1352530021 is about 1105.8994392600.

Adding to 1352530021 its reverse (1200352531), we get a palindrome (2552882552).

The spelling of 1352530021 in words is "one billion, three hundred fifty-two million, five hundred thirty thousand, twenty-one".