1440525521 has 2 divisors, whose sum is σ = 1440525522. Its totient is φ = 1440525520.

The previous prime is 1440525511. The next prime is 1440525539. The reversal of 1440525521 is 1255250441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1354240000 + 86285521 = 36800^2 + 9289^2 .

It is a cyclic number.

It is not a de Polignac number, because 1440525521 - 2¹⁰ = 1440524497 is a prime.

It is a super-2 number, since 2×1440525521² = 4150227553304642882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1440525511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720262760 + 720262761.

It is an arithmetic number, because the mean of its divisors is an integer number (720262761).

Almost surely, 2^1440525521 is an apocalyptic number.

It is an amenable number.

1440525521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440525521 is an equidigital number, since it uses as much as digits as its factorization.

1440525521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8000, while the sum is 29.

The square root of 1440525521 is about 37954.2556375435. The cubic root of 1440525521 is about 1129.3805885594.

Adding to 1440525521 its reverse (1255250441), we get a palindrome (2695775962).

The spelling of 1440525521 in words is "one billion, four hundred forty million, five hundred twenty-five thousand, five hundred twenty-one".