1994642 has 8 divisors (see below), whose sum is σ = 3222156. Its totient is φ = 920592.

The previous prime is 1994623. The next prime is 1994647. The reversal of 1994642 is 2464991.

It can be written as a sum of positive squares in 2 ways, for example, as 1990921 + 3721 = 1411^2 + 61^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1994647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38333 + ... + 38384.

2^1994642 is an apocalyptic number.

1994642 is a deficient number, since it is larger than the sum of its proper divisors (1227514).

1994642 is a wasteful number, since it uses less digits than its factorization.

1994642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76732.

The product of its digits is 15552, while the sum is 35.

The square root of 1994642 is about 1412.3179528704. The cubic root of 1994642 is about 125.8794934176.

The spelling of 1994642 in words is "one million, nine hundred ninety-four thousand, six hundred forty-two".