1306051601 has 4 divisors (see below), whose sum is σ = 1306124400. Its totient is φ = 1305978804.

The previous prime is 1306051561. The next prime is 1306051631. The reversal of 1306051601 is 1061506031.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1306051601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1306051631) 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, 11690 + ... + 52428.

It is an arithmetic number, because the mean of its divisors is an integer number (326531100).

Almost surely, 2^1306051601 is an apocalyptic number.

It is an amenable number.

1306051601 is a deficient number, since it is larger than the sum of its proper divisors (72799).

1306051601 is an equidigital number, since it uses as much as digits as its factorization.

1306051601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72798.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1306051601 is about 36139.3359236165. The cubic root of 1306051601 is about 1093.0837682561.

Adding to 1306051601 its reverse (1061506031), we get a palindrome (2367557632).

The spelling of 1306051601 in words is "one billion, three hundred six million, fifty-one thousand, six hundred one".