1526521225 has 24 divisors (see below), whose sum is σ = 1980373248. Its totient is φ = 1166044800.

The previous prime is 1526521151. The next prime is 1526521259. The reversal of 1526521225 is 5221256251.

It is a happy number.

It is not a de Polignac number, because 1526521225 - 2¹⁷ = 1526390153 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 23 ways as a sum of consecutive naturals, for example, 32332 + ... + 64018.

It is an arithmetic number, because the mean of its divisors is an integer number (82515552).

Almost surely, 2^1526521225 is an apocalyptic number.

It is an amenable number.

1526521225 is a deficient number, since it is larger than the sum of its proper divisors (453852023).

1526521225 is a wasteful number, since it uses less digits than its factorization.

1526521225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31785 (or 31780 counting only the distinct ones).

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

The square root of 1526521225 is about 39070.7208149530. The cubic root of 1526521225 is about 1151.4213616134.

Adding to 1526521225 its reverse (5221256251), we get a palindrome (6747777476).

The spelling of 1526521225 in words is "one billion, five hundred twenty-six million, five hundred twenty-one thousand, two hundred twenty-five".