1994906 has 4 divisors (see below), whose sum is σ = 2992362. Its totient is φ = 997452.

The previous prime is 1994897. The next prime is 1994911. The reversal of 1994906 is 6094991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1934881 + 60025 = 1391^2 + 245^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1994906.

It is an unprimeable number.

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, 498725 + ... + 498728.

2^1994906 is an apocalyptic number.

1994906 is a deficient number, since it is larger than the sum of its proper divisors (997456).

1994906 is an equidigital number, since it uses as much as digits as its factorization.

1994906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997455.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 1994906 is about 1412.4114131513. The cubic root of 1994906 is about 125.8850467484.

The spelling of 1994906 in words is "one million, nine hundred ninety-four thousand, nine hundred six".