1671057 has 16 divisors (see below), whose sum is σ = 2520000. Its totient is φ = 1094112.

The previous prime is 1671053. The next prime is 1671073. The reversal of 1671057 is 7501761.

It is not a de Polignac number, because 1671057 - 2² = 1671053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 1671057.

It is not an unprimeable number, because it can be changed into a prime (1671053) 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 15 ways as a sum of consecutive naturals, for example, 1069 + ... + 2117.

It is an arithmetic number, because the mean of its divisors is an integer number (157500).

2^1671057 is an apocalyptic number.

It is an amenable number.

1671057 is a deficient number, since it is larger than the sum of its proper divisors (848943).

1671057 is a wasteful number, since it uses less digits than its factorization.

1671057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117 (or 1111 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 27.

The square root of 1671057 is about 1292.6936992188. The cubic root of 1671057 is about 118.6671251858.

The spelling of 1671057 in words is "one million, six hundred seventy-one thousand, fifty-seven".