1671575057 has 4 divisors (see below), whose sum is σ = 1672949796. Its totient is φ = 1670200320.

The previous prime is 1671575053. The next prime is 1671575093. The reversal of 1671575057 is 7505751761.

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 1117631761 + 553943296 = 33431^2 + 23536^2 .

It is a cyclic number.

It is not a de Polignac number, because 1671575057 - 2² = 1671575053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1671574999 and 1671575017.

It is not an unprimeable number, because it can be changed into a prime (1671575053) 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, 685544 + ... + 687977.

It is an arithmetic number, because the mean of its divisors is an integer number (418237449).

Almost surely, 2^1671575057 is an apocalyptic number.

It is an amenable number.

1671575057 is a deficient number, since it is larger than the sum of its proper divisors (1374739).

1671575057 is a wasteful number, since it uses less digits than its factorization.

1671575057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374738.

The product of its (nonzero) digits is 257250, while the sum is 44.

The square root of 1671575057 is about 40884.9001099428. The cubic root of 1671575057 is about 1186.7938688269.

The spelling of 1671575057 in words is "one billion, six hundred seventy-one million, five hundred seventy-five thousand, fifty-seven".