2105157 has 4 divisors (see below), whose sum is σ = 2806880. Its totient is φ = 1403436.

The previous prime is 2105149. The next prime is 2105183. The reversal of 2105157 is 7515012.

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.

It is not a de Polignac number, because 2105157 - 2³ = 2105149 is a prime.

It is a D-number.

It is a Duffinian number.

2105157 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350857 + ... + 350862.

It is an arithmetic number, because the mean of its divisors is an integer number (701720).

2^2105157 is an apocalyptic number.

It is an amenable number.

2105157 is a deficient number, since it is larger than the sum of its proper divisors (701723).

2105157 is an equidigital number, since it uses as much as digits as its factorization.

2105157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701722.

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 2105157 is about 1450.9159176189. The cubic root of 2105157 is about 128.1626553609.

The spelling of 2105157 in words is "two million, one hundred five thousand, one hundred fifty-seven".