2197405 has 12 divisors (see below), whose sum is σ = 3067740. Its totient is φ = 1506624.

The previous prime is 2197387. The next prime is 2197409. The reversal of 2197405 is 5047912.

It is a happy number.

2197405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 974169 + 1223236 = 987^2 + 1106^2 .

It is not a de Polignac number, because 2197405 - 2⁷ = 2197277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2197409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4240 + ... + 4729.

It is an arithmetic number, because the mean of its divisors is an integer number (255645).

2^2197405 is an apocalyptic number.

It is an amenable number.

2197405 is a deficient number, since it is larger than the sum of its proper divisors (870335).

2197405 is an equidigital number, since it uses as much as digits as its factorization.

2197405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8988 (or 8981 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 2197405 is about 1482.3646649863. The cubic root of 2197405 is about 130.0079876749.

The spelling of 2197405 in words is "two million, one hundred ninety-seven thousand, four hundred five".