1728057 has 4 divisors (see below), whose sum is σ = 2304080. Its totient is φ = 1152036.

The previous prime is 1728043. The next prime is 1728061. The reversal of 1728057 is 7508271.

It is a happy number.

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 1728057 - 2¹¹ = 1726009 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1728017) 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, 288007 + ... + 288012.

It is an arithmetic number, because the mean of its divisors is an integer number (576020).

2^1728057 is an apocalyptic number.

It is an amenable number.

1728057 is a deficient number, since it is larger than the sum of its proper divisors (576023).

1728057 is an equidigital number, since it uses as much as digits as its factorization.

1728057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576022.

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 1728057 is about 1314.5558185182. Note that the first 3 decimals coincide. The cubic root of 1728057 is about 120.0013194299.

The spelling of 1728057 in words is "one million, seven hundred twenty-eight thousand, fifty-seven".