1306520203 has 8 divisors (see below), whose sum is σ = 1367663616. Its totient is φ = 1246564200.

The previous prime is 1306520179. The next prime is 1306520219. The reversal of 1306520203 is 3020256031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1306520203 - 2²¹ = 1304423051 is a prime.

It is a super-2 number, since 2×1306520203² = 3413990081694322418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1306520233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 294601 + ... + 299002.

It is an arithmetic number, because the mean of its divisors is an integer number (170957952).

Almost surely, 2^1306520203 is an apocalyptic number.

1306520203 is a deficient number, since it is larger than the sum of its proper divisors (61143413).

1306520203 is an equidigital number, since it uses as much as digits as its factorization.

1306520203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593705.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 1306520203 is about 36145.8186101795. The cubic root of 1306520203 is about 1093.2144828444.

Adding to 1306520203 its reverse (3020256031), we get a palindrome (4326776234).

The spelling of 1306520203 in words is "one billion, three hundred six million, five hundred twenty thousand, two hundred three".