1591366 has 16 divisors (see below), whose sum is σ = 2746656. Its totient is φ = 677376.

The previous prime is 1591363. The next prime is 1591367. The reversal of 1591366 is 6631951.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1591363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2470 + ... + 3046.

It is an arithmetic number, because the mean of its divisors is an integer number (171666).

2^1591366 is an apocalyptic number.

1591366 is a deficient number, since it is larger than the sum of its proper divisors (1155290).

1591366 is a wasteful number, since it uses less digits than its factorization.

1591366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783.

The product of its digits is 4860, while the sum is 31.

The square root of 1591366 is about 1261.4935592384. The cubic root of 1591366 is about 116.7499468871.

The spelling of 1591366 in words is "one million, five hundred ninety-one thousand, three hundred sixty-six".