1669671 has 6 divisors (see below), whose sum is σ = 2411760. Its totient is φ = 1113108.

The previous prime is 1669651. The next prime is 1669687. The reversal of 1669671 is 1769661.

It is not a de Polignac number, because 1669671 - 2⁷ = 1669543 is a prime.

1669671 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1669651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 92751 + ... + 92768.

It is an arithmetic number, because the mean of its divisors is an integer number (401960).

2^1669671 is an apocalyptic number.

1669671 is a deficient number, since it is larger than the sum of its proper divisors (742089).

1669671 is a wasteful number, since it uses less digits than its factorization.

1669671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185525 (or 185522 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 1669671 is about 1292.1574981402. The cubic root of 1669671 is about 118.6343080072.

The spelling of 1669671 in words is "one million, six hundred sixty-nine thousand, six hundred seventy-one".