1525665425 has 12 divisors (see below), whose sum is σ = 2003109516. Its totient is φ = 1148736000.

The previous prime is 1525665419. The next prime is 1525665457. The reversal of 1525665425 is 5245665251.

It can be written as a sum of positive squares in 6 ways, for example, as 12222016 + 1513443409 = 3496^2 + 38903^2 .

It is not a de Polignac number, because 1525665425 - 2¹² = 1525661329 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 11 ways as a sum of consecutive naturals, for example, 1794476 + ... + 1795325.

It is an arithmetic number, because the mean of its divisors is an integer number (166925793).

Almost surely, 2^1525665425 is an apocalyptic number.

It is an amenable number.

1525665425 is a deficient number, since it is larger than the sum of its proper divisors (477444091).

1525665425 is a wasteful number, since it uses less digits than its factorization.

1525665425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3589828 (or 3589823 counting only the distinct ones).

The product of its digits is 360000, while the sum is 41.

The square root of 1525665425 is about 39059.7673444172. The cubic root of 1525665425 is about 1151.2061510231.

The spelling of 1525665425 in words is "one billion, five hundred twenty-five million, six hundred sixty-five thousand, four hundred twenty-five".