1260556091 has 2 divisors, whose sum is σ = 1260556092. Its totient is φ = 1260556090.

The previous prime is 1260556049. The next prime is 1260556093. The reversal of 1260556091 is 1906550621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1260556091 - 2¹⁰ = 1260555067 is a prime.

It is a Sophie Germain prime.

Together with 1260556093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1260556093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630278045 + 630278046.

It is an arithmetic number, because the mean of its divisors is an integer number (630278046).

Almost surely, 2^1260556091 is an apocalyptic number.

1260556091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1260556091 is an equidigital number, since it uses as much as digits as its factorization.

1260556091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 1260556091 is about 35504.3108791031. The cubic root of 1260556091 is about 1080.2411701354.

The spelling of 1260556091 in words is "one billion, two hundred sixty million, five hundred fifty-six thousand, ninety-one".