2194987 has 6 divisors (see below), whose sum is σ = 2240124. Its totient is φ = 2150280.

The previous prime is 2194979. The next prime is 2194991. The reversal of 2194987 is 7894912.

It is not a de Polignac number, because 2194987 - 2³ = 2194979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2194967) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12037 + ... + 12217.

It is an arithmetic number, because the mean of its divisors is an integer number (373354).

2^2194987 is an apocalyptic number.

2194987 is a deficient number, since it is larger than the sum of its proper divisors (45137).

2194987 is an frugal number, since it uses more digits than its factorization.

2194987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429 (or 248 counting only the distinct ones).

The product of its digits is 36288, while the sum is 40.

The square root of 2194987 is about 1481.5488517089. The cubic root of 2194987 is about 129.9602837255.

The spelling of 2194987 in words is "two million, one hundred ninety-four thousand, nine hundred eighty-seven".