1671001 has 4 divisors (see below), whose sum is σ = 1676752. Its totient is φ = 1665252.

The previous prime is 1670983. The next prime is 1671041. The reversal of 1671001 is 1001761.

1671001 is nontrivially palindromic in base 4.

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: 1001761 = 59 ⋅16979.

It is a cyclic number.

It is not a de Polignac number, because 1671001 - 2⁹ = 1670489 is a prime.

It is a Duffinian number.

1671001 is a lucky number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1671041) 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, 2415 + ... + 3028.

It is an arithmetic number, because the mean of its divisors is an integer number (419188).

2^1671001 is an apocalyptic number.

It is an amenable number.

1671001 is a deficient number, since it is larger than the sum of its proper divisors (5751).

1671001 is an equidigital number, since it uses as much as digits as its factorization.

1671001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5750.

The product of its (nonzero) digits is 42, while the sum is 16.

The square root of 1671001 is about 1292.6720388405. The cubic root of 1671001 is about 118.6657995911.

Adding to 1671001 its reverse (1001761), we get a palindrome (2672762).

It can be divided in two parts, 16 and 71001, that added together give a palindrome (71017).

The spelling of 1671001 in words is "one million, six hundred seventy-one thousand, one".