1986494 has 4 divisors (see below), whose sum is σ = 2979744. Its totient is φ = 993246.

The previous prime is 1986461. The next prime is 1986497. The reversal of 1986494 is 4946891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4946891 = 47 ⋅105253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1986497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496622 + ... + 496625.

It is an arithmetic number, because the mean of its divisors is an integer number (744936).

2^1986494 is an apocalyptic number.

1986494 is a deficient number, since it is larger than the sum of its proper divisors (993250).

1986494 is an equidigital number, since it uses as much as digits as its factorization.

1986494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993249.

The product of its digits is 62208, while the sum is 41.

The square root of 1986494 is about 1409.4303813953. The cubic root of 1986494 is about 125.7078559531.

The spelling of 1986494 in words is "one million, nine hundred eighty-six thousand, four hundred ninety-four".