2097157 has 4 divisors (see below), whose sum is σ = 2136780. Its totient is φ = 2057536.

The previous prime is 2097143. The next prime is 2097169. The reversal of 2097157 is 7517902.

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 1406596 + 690561 = 1186^2 + 831^2 .

It is a cyclic number.

It is not a de Polignac number, because 2097157 - 2¹¹ = 2095109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2097257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19732 + ... + 19837.

It is an arithmetic number, because the mean of its divisors is an integer number (534195).

2^2097157 is an apocalyptic number.

It is an amenable number.

2097157 is a deficient number, since it is larger than the sum of its proper divisors (39623).

2097157 is an equidigital number, since it uses as much as digits as its factorization.

2097157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39622.

The product of its (nonzero) digits is 4410, while the sum is 31.

The square root of 2097157 is about 1448.1564142039. The cubic root of 2097157 is about 128.0001017252. Note that the first 3 decimals are identical.

The spelling of 2097157 in words is "two million, ninety-seven thousand, one hundred fifty-seven".