2097145 has 4 divisors (see below), whose sum is σ = 2516580. Its totient is φ = 1677712.

The previous prime is 2097143. The next prime is 2097169. The reversal of 2097145 is 5417902.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 725904 + 1371241 = 852^2 + 1171^2 .

It is a cyclic number.

It is not a de Polignac number, because 2097145 - 2¹ = 2097143 is a prime.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (2097143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209710 + ... + 209719.

It is an arithmetic number, because the mean of its divisors is an integer number (629145).

2^2097145 is an apocalyptic number.

It is an amenable number.

2097145 is a deficient number, since it is larger than the sum of its proper divisors (419435).

2097145 is an equidigital number, since it uses as much as digits as its factorization.

2097145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419434.

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

The square root of 2097145 is about 1448.1522709992. The cubic root of 2097145 is about 127.9998575845. Note that the first 3 decimals are identical.

The spelling of 2097145 in words is "two million, ninety-seven thousand, one hundred forty-five".