1351952521 has 2 divisors, whose sum is σ = 1351952522. Its totient is φ = 1351952520.

The previous prime is 1351952519. The next prime is 1351952527. The reversal of 1351952521 is 1252591531.

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., 1351665225 + 287296 = 36765^2 + 536^2 .

It is a cyclic number.

It is not a de Polignac number, because 1351952521 - 2¹ = 1351952519 is a prime.

Together with 1351952519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1351952527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 675976260 + 675976261.

It is an arithmetic number, because the mean of its divisors is an integer number (675976261).

Almost surely, 2^1351952521 is an apocalyptic number.

It is an amenable number.

1351952521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1351952521 is an equidigital number, since it uses as much as digits as its factorization.

1351952521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13500, while the sum is 34.

The square root of 1351952521 is about 36768.9069867463. The cubic root of 1351952521 is about 1105.7420187628.

The spelling of 1351952521 in words is "one billion, three hundred fifty-one million, nine hundred fifty-two thousand, five hundred twenty-one".