1301215525 has 6 divisors (see below), whose sum is σ = 1613507282. Its totient is φ = 1040972400.

The previous prime is 1301215523. The next prime is 1301215541. The reversal of 1301215525 is 5255121031.

It can be written as a sum of positive squares in 3 ways, for example, as 42810849 + 1258404676 = 6543^2 + 35474^2 .

It is not a de Polignac number, because 1301215525 - 2¹ = 1301215523 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 52048621 = 1301215525 / (1 + 3 + 0 + 1 + 2 + 1 + 5 + 5 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1301215525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1301215523) 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 in 5 ways as a sum of consecutive naturals, for example, 26024286 + ... + 26024335.

Almost surely, 2^1301215525 is an apocalyptic number.

It is an amenable number.

1301215525 is a deficient number, since it is larger than the sum of its proper divisors (312291757).

1301215525 is an equidigital number, since it uses as much as digits as its factorization.

1301215525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52048631 (or 52048626 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 1301215525 is about 36072.3651151404. The cubic root of 1301215525 is about 1091.7329348761.

Adding to 1301215525 its reverse (5255121031), we get a palindrome (6556336556).

The spelling of 1301215525 in words is "one billion, three hundred one million, two hundred fifteen thousand, five hundred twenty-five".