2196645 has 16 divisors (see below), whose sum is σ = 3834432. Its totient is φ = 1064960.

The previous prime is 2196641. The next prime is 2196659. The reversal of 2196645 is 5466912.

It is not a de Polignac number, because 2196645 - 2² = 2196641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

2196645 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2196641) 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, 6492 + ... + 6821.

It is an arithmetic number, because the mean of its divisors is an integer number (239652).

2^2196645 is an apocalyptic number.

It is an amenable number.

2196645 is a deficient number, since it is larger than the sum of its proper divisors (1637787).

2196645 is a wasteful number, since it uses less digits than its factorization.

2196645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13332.

The product of its digits is 12960, while the sum is 33.

The square root of 2196645 is about 1482.1082956383. The cubic root of 2196645 is about 129.9929976504.

The spelling of 2196645 in words is "two million, one hundred ninety-six thousand, six hundred forty-five".