1024001521 has 2 divisors, whose sum is σ = 1024001522. Its totient is φ = 1024001520.

The previous prime is 1024001519. The next prime is 1024001543. The reversal of 1024001521 is 1251004201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1024000000 + 1521 = 32000^2 + 39^2 .

It is a cyclic number.

It is not a de Polignac number, because 1024001521 - 2¹ = 1024001519 is a prime.

Together with 1024001519, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1024001495 and 1024001504.

It is not a weakly prime, because it can be changed into another prime (1024001591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512000760 + 512000761.

It is an arithmetic number, because the mean of its divisors is an integer number (512000761).

Almost surely, 2^1024001521 is an apocalyptic number.

It is an amenable number.

1024001521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1024001521 is an equidigital number, since it uses as much as digits as its factorization.

1024001521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1024001521 is about 32000.0237656162. The cubic root of 1024001521 is about 1007.9373389625.

Adding to 1024001521 its reverse (1251004201), we get a palindrome (2275005722).

It can be divided in two parts, 102400 and 1521, that multiplied together give a square (155750400 = 12480²).

The spelling of 1024001521 in words is "one billion, twenty-four million, one thousand, five hundred twenty-one".