1525302725 has 12 divisors (see below), whose sum is σ = 1894788324. Its totient is φ = 1218040320.

The previous prime is 1525302721. The next prime is 1525302749. The reversal of 1525302725 is 5272035251.

It can be written as a sum of positive squares in 6 ways, for example, as 15358561 + 1509944164 = 3919^2 + 38858^2 .

It is not a de Polignac number, because 1525302725 - 2² = 1525302721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1525302691 and 1525302700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1525302721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40844 + ... + 68693.

It is an arithmetic number, because the mean of its divisors is an integer number (157899027).

Almost surely, 2^1525302725 is an apocalyptic number.

It is an amenable number.

1525302725 is a deficient number, since it is larger than the sum of its proper divisors (369485599).

1525302725 is a wasteful number, since it uses less digits than its factorization.

1525302725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110104 (or 110099 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 1525302725 is about 39055.1241836459. The cubic root of 1525302725 is about 1151.1149174852.

Adding to 1525302725 its reverse (5272035251), we get a palindrome (6797337976).

The spelling of 1525302725 in words is "one billion, five hundred twenty-five million, three hundred two thousand, seven hundred twenty-five".