1491686 has 16 divisors (see below), whose sum is σ = 2612736. Its totient is φ = 625416.

The previous prime is 1491683. The next prime is 1491701. The reversal of 1491686 is 6861941.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491683) 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 in 7 ways as a sum of consecutive naturals, for example, 476 + ... + 1791.

It is an arithmetic number, because the mean of its divisors is an integer number (163296).

2^1491686 is an apocalyptic number.

1491686 is a deficient number, since it is larger than the sum of its proper divisors (1121050).

1491686 is a wasteful number, since it uses less digits than its factorization.

1491686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2323.

The product of its digits is 10368, while the sum is 35.

The square root of 1491686 is about 1221.3459788283. The cubic root of 1491686 is about 114.2595399880.

The spelling of 1491686 in words is "one million, four hundred ninety-one thousand, six hundred eighty-six".