1521532541 has 2 divisors, whose sum is σ = 1521532542. Its totient is φ = 1521532540.

The previous prime is 1521532499. The next prime is 1521532543. The reversal of 1521532541 is 1452351251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 938503225 + 583029316 = 30635^2 + 24146^2 .

It is a cyclic number.

It is not a de Polignac number, because 1521532541 - 2²² = 1517338237 is a prime.

It is a super-2 number, since 2×1521532541² = 4630122546643833362, which contains 22 as substring.

Together with 1521532543, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1521532543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760766270 + 760766271.

It is an arithmetic number, because the mean of its divisors is an integer number (760766271).

Almost surely, 2^1521532541 is an apocalyptic number.

It is an amenable number.

1521532541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1521532541 is an equidigital number, since it uses as much as digits as its factorization.

1521532541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6000, while the sum is 29.

The square root of 1521532541 is about 39006.8268512064. The cubic root of 1521532541 is about 1150.1657079424.

Adding to 1521532541 its reverse (1452351251), we get a palindrome (2973883792).

The spelling of 1521532541 in words is "one billion, five hundred twenty-one million, five hundred thirty-two thousand, five hundred forty-one".