1994385 has 16 divisors (see below), whose sum is σ = 3294720. Its totient is φ = 1029120.

The previous prime is 1994381. The next prime is 1994387. The reversal of 1994385 is 5834991.

It is not a de Polignac number, because 1994385 - 2² = 1994381 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1994381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1680 + ... + 2609.

It is an arithmetic number, because the mean of its divisors is an integer number (205920).

2^1994385 is an apocalyptic number.

1994385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1994385 is a deficient number, since it is larger than the sum of its proper divisors (1300335).

1994385 is a wasteful number, since it uses less digits than its factorization.

1994385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4328.

The product of its digits is 38880, while the sum is 39.

The square root of 1994385 is about 1412.2269647617. The cubic root of 1994385 is about 125.8740868636.

Subtracting 1994385 from its reverse (5834991), we obtain a triangular number (3840606 = T₂₇₇₁).

The spelling of 1994385 in words is "one million, nine hundred ninety-four thousand, three hundred eighty-five".