1260260513 has 4 divisors (see below), whose sum is σ = 1261045380. Its totient is φ = 1259475648.

The previous prime is 1260260503. The next prime is 1260260531. The reversal of 1260260513 is 3150620621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3150620621 = 43 ⋅73270247.

It can be written as a sum of positive squares in 2 ways, for example, as 752569489 + 507691024 = 27433^2 + 22532^2 .

It is a cyclic number.

It is not a de Polignac number, because 1260260513 - 2¹⁰ = 1260259489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1260260503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390020 + ... + 393237.

It is an arithmetic number, because the mean of its divisors is an integer number (315261345).

Almost surely, 2^1260260513 is an apocalyptic number.

It is an amenable number.

1260260513 is a deficient number, since it is larger than the sum of its proper divisors (784867).

1260260513 is an equidigital number, since it uses as much as digits as its factorization.

1260260513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784866.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1260260513 is about 35500.1480701137. The cubic root of 1260260513 is about 1080.1567310833.

The spelling of 1260260513 in words is "one billion, two hundred sixty million, two hundred sixty thousand, five hundred thirteen".