2195987 has 4 divisors (see below), whose sum is σ = 2255376. Its totient is φ = 2136600.

The previous prime is 2195969. The next prime is 2195989. The reversal of 2195987 is 7895912.

2195987 is an esthetic number in base 12, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2195987 - 2⁶ = 2195923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2195989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29639 + ... + 29712.

It is an arithmetic number, because the mean of its divisors is an integer number (563844).

2^2195987 is an apocalyptic number.

2195987 is a deficient number, since it is larger than the sum of its proper divisors (59389).

2195987 is an equidigital number, since it uses as much as digits as its factorization.

2195987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59388.

The product of its digits is 45360, while the sum is 41.

The square root of 2195987 is about 1481.8862979325. The cubic root of 2195987 is about 129.9800166522.

The spelling of 2195987 in words is "two million, one hundred ninety-five thousand, nine hundred eighty-seven".