1230513525 has 60 divisors (see below), whose sum is σ = 2335087524. Its totient is φ = 640224000.

The previous prime is 1230513521. The next prime is 1230513527. The reversal of 1230513525 is 5253150321.

It is a happy number.

1230513525 is a `hidden beast` number, since 1 + 2 + 305 + 1 + 352 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 237129201 + 993384324 = 15399^2 + 31518^2 .

It is not a de Polignac number, because 1230513525 - 2² = 1230513521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230513521) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 75615 + ... + 90435.

Almost surely, 2^1230513525 is an apocalyptic number.

1230513525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1230513525 is a deficient number, since it is larger than the sum of its proper divisors (1104573999).

1230513525 is a wasteful number, since it uses less digits than its factorization.

1230513525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14884 (or 14870 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 1230513525 is about 35078.6762150455. The cubic root of 1230513525 is about 1071.5903578546.

Adding to 1230513525 its reverse (5253150321), we get a palindrome (6483663846).

The spelling of 1230513525 in words is "one billion, two hundred thirty million, five hundred thirteen thousand, five hundred twenty-five".