2197857 has 16 divisors (see below), whose sum is σ = 3120768. Its totient is φ = 1372800.

The previous prime is 2197849. The next prime is 2197873. The reversal of 2197857 is 7587912.

It is not a de Polignac number, because 2197857 - 2³ = 2197849 is a prime.

It is a d-powerful number, because it can be written as 2¹³ + 1 + 9³ + 7⁶ + 8³ + 5⁹ + 7⁶ .

It is not an unprimeable number, because it can be changed into a prime (2197847) 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, 3357 + ... + 3957.

It is an arithmetic number, because the mean of its divisors is an integer number (195048).

2^2197857 is an apocalyptic number.

It is an amenable number.

2197857 is a deficient number, since it is larger than the sum of its proper divisors (922911).

2197857 is a wasteful number, since it uses less digits than its factorization.

2197857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680.

The product of its digits is 35280, while the sum is 39.

The square root of 2197857 is about 1482.5171162587. The cubic root of 2197857 is about 130.0169011557.

The spelling of 2197857 in words is "two million, one hundred ninety-seven thousand, eight hundred fifty-seven".