1994145 has 16 divisors (see below), whose sum is σ = 3359040. Its totient is φ = 1007424.

The previous prime is 1994143. The next prime is 1994191. The reversal of 1994145 is 5414991.

It is not a de Polignac number, because 1994145 - 2¹ = 1994143 is a prime.

It is a super-2 number, since 2×1994145² = 7953228562050, which contains 22 as substring.

It is a Curzon number.

1994145 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1994143) 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, 3214 + ... + 3783.

It is an arithmetic number, because the mean of its divisors is an integer number (209940).

2^1994145 is an apocalyptic number.

1994145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1994145 is a deficient number, since it is larger than the sum of its proper divisors (1364895).

1994145 is a wasteful number, since it uses less digits than its factorization.

1994145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7024.

The product of its digits is 6480, while the sum is 33.

The square root of 1994145 is about 1412.1419900279. The cubic root of 1994145 is about 125.8690375221.

The spelling of 1994145 in words is "one million, nine hundred ninety-four thousand, one hundred forty-five".