1591207 has 2 divisors, whose sum is σ = 1591208. Its totient is φ = 1591206.

The previous prime is 1591189. The next prime is 1591211. The reversal of 1591207 is 7021951.

It is a strong prime.

It is an emirp because it is prime and its reverse (7021951) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1591207 - 2¹⁵ = 1558439 is a prime.

It is a nialpdrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1591237) 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, 795603 + 795604.

It is an arithmetic number, because the mean of its divisors is an integer number (795604).

2^1591207 is an apocalyptic number.

1591207 is a deficient number, since it is larger than the sum of its proper divisors (1).

1591207 is an equidigital number, since it uses as much as digits as its factorization.

1591207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 1591207 is about 1261.4305371284. The cubic root of 1591207 is about 116.7460584332.

The spelling of 1591207 in words is "one million, five hundred ninety-one thousand, two hundred seven".