2196945 has 12 divisors (see below), whose sum is σ = 3808116. Its totient is φ = 1171680.

The previous prime is 2196941. The next prime is 2196959. The reversal of 2196945 is 5496912.

It can be written as a sum of positive squares in 2 ways, for example, as 1252161 + 944784 = 1119^2 + 972^2 .

It is not a de Polignac number, because 2196945 - 2² = 2196941 is a prime.

2196945 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2196941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24366 + ... + 24455.

It is an arithmetic number, because the mean of its divisors is an integer number (317343).

2^2196945 is an apocalyptic number.

It is an amenable number.

2196945 is a deficient number, since it is larger than the sum of its proper divisors (1611171).

2196945 is a wasteful number, since it uses less digits than its factorization.

2196945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48832 (or 48829 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 2196945 is about 1482.2094993624. The cubic root of 2196945 is about 129.9989151783.

The spelling of 2196945 in words is "two million, one hundred ninety-six thousand, nine hundred forty-five".