2057161 has 4 divisors (see below), whose sum is σ = 2065024. Its totient is φ = 2049300.

The previous prime is 2057147. The next prime is 2057177. The reversal of 2057161 is 1617502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1617502 = 2 ⋅808751.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2057161 is a prime.

It is a super-2 number, since 2×2057161² = 8463822759842, which contains 22 as substring.

It is a Duffinian number.

2057161 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2057141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3525 + ... + 4066.

It is an arithmetic number, because the mean of its divisors is an integer number (516256).

2^2057161 is an apocalyptic number.

It is an amenable number.

2057161 is a deficient number, since it is larger than the sum of its proper divisors (7863).

2057161 is an equidigital number, since it uses as much as digits as its factorization.

2057161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7862.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 2057161 is about 1434.2806559387. The cubic root of 2057161 is about 127.1811538406.

The spelling of 2057161 in words is "two million, fifty-seven thousand, one hundred sixty-one".