1306887557 has 8 divisors (see below), whose sum is σ = 1327347072. Its totient is φ = 1286485200.

The previous prime is 1306887551. The next prime is 1306887613. The reversal of 1306887557 is 7557886031.

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 1306887557 - 2⁴ = 1306887541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306887551) 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, 33008 + ... + 60854.

It is an arithmetic number, because the mean of its divisors is an integer number (165918384).

Almost surely, 2^1306887557 is an apocalyptic number.

It is an amenable number.

1306887557 is a deficient number, since it is larger than the sum of its proper divisors (20459515).

1306887557 is an equidigital number, since it uses as much as digits as its factorization.

1306887557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28579.

The product of its (nonzero) digits is 1411200, while the sum is 50.

The square root of 1306887557 is about 36150.8998089951. The cubic root of 1306887557 is about 1093.3169328688.

The spelling of 1306887557 in words is "one billion, three hundred six million, eight hundred eighty-seven thousand, five hundred fifty-seven".