1591127 has 2 divisors, whose sum is σ = 1591128. Its totient is φ = 1591126.

The previous prime is 1591103. The next prime is 1591141. The reversal of 1591127 is 7211951.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1591127 - 2²⁰ = 542551 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1591096 and 1591105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1591927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 795563 + 795564.

It is an arithmetic number, because the mean of its divisors is an integer number (795564).

2^1591127 is an apocalyptic number.

1591127 is a deficient number, since it is larger than the sum of its proper divisors (1).

1591127 is an equidigital number, since it uses as much as digits as its factorization.

1591127 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 630, while the sum is 26.

The square root of 1591127 is about 1261.3988266999. The cubic root of 1591127 is about 116.7441018805.

The spelling of 1591127 in words is "one million, five hundred ninety-one thousand, one hundred twenty-seven".