1521534541 has 2 divisors, whose sum is σ = 1521534542. Its totient is φ = 1521534540.

The previous prime is 1521534533. The next prime is 1521534551. The reversal of 1521534541 is 1454351251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1198613641 + 322920900 = 34621^2 + 17970^2 .

It is an emirp because it is prime and its reverse (1454351251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1521534541 - 2³ = 1521534533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1521534551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760767270 + 760767271.

It is an arithmetic number, because the mean of its divisors is an integer number (760767271).

Almost surely, 2^1521534541 is an apocalyptic number.

It is an amenable number.

1521534541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1521534541 is an equidigital number, since it uses as much as digits as its factorization.

1521534541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12000, while the sum is 31.

The square root of 1521534541 is about 39006.8524877360. The cubic root of 1521534541 is about 1150.1662118927.

Adding to 1521534541 its reverse (1454351251), we get a palindrome (2975885792).

The spelling of 1521534541 in words is "one billion, five hundred twenty-one million, five hundred thirty-four thousand, five hundred forty-one".