2198745 has 40 divisors (see below), whose sum is σ = 4051080. Its totient is φ = 1140480.

The previous prime is 2198723. The next prime is 2198747. The reversal of 2198745 is 5478912.

It can be written as a sum of positive squares in 4 ways, for example, as 46656 + 2152089 = 216^2 + 1467^2 .

It is not a de Polignac number, because 2198745 - 2⁷ = 2198617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2198747) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 24661 + ... + 24749.

It is an arithmetic number, because the mean of its divisors is an integer number (101277).

2^2198745 is an apocalyptic number.

It is an amenable number.

2198745 is a deficient number, since it is larger than the sum of its proper divisors (1852335).

2198745 is an equidigital number, since it uses as much as digits as its factorization.

2198745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 158 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 2198745 is about 1482.8165766540. The cubic root of 2198745 is about 130.0344090376.

The spelling of 2198745 in words is "two million, one hundred ninety-eight thousand, seven hundred forty-five".