1994345 has 8 divisors (see below), whose sum is σ = 2400840. Its totient is φ = 1590400.

The previous prime is 1994341. The next prime is 1994347. The reversal of 1994345 is 5434991.

It can be written as a sum of positive squares in 4 ways, for example, as 222784 + 1771561 = 472^2 + 1331^2 .

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

It is not a de Polignac number, because 1994345 - 2² = 1994341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1994341) 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 7 ways as a sum of consecutive naturals, for example, 2495 + ... + 3195.

It is an arithmetic number, because the mean of its divisors is an integer number (300105).

2^1994345 is an apocalyptic number.

It is an amenable number.

1994345 is a deficient number, since it is larger than the sum of its proper divisors (406495).

1994345 is an equidigital number, since it uses as much as digits as its factorization.

1994345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275.

The product of its digits is 19440, while the sum is 35.

The square root of 1994345 is about 1412.2128026611. The cubic root of 1994345 is about 125.8732453348.

The spelling of 1994345 in words is "one million, nine hundred ninety-four thousand, three hundred forty-five".