1671424 has 18 divisors (see below), whose sum is σ = 3336830. Its totient is φ = 835584.

The previous prime is 1671421. The next prime is 1671431. The reversal of 1671424 is 4241761.

It can be written as a sum of positive squares in only one way, i.e., 1081600 + 589824 = 1040^2 + 768^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1671421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3009 + ... + 3520.

2^1671424 is an apocalyptic number.

It is an amenable number.

1671424 is a deficient number, since it is larger than the sum of its proper divisors (1665406).

1671424 is an frugal number, since it uses more digits than its factorization.

1671424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6545 (or 6531 counting only the distinct ones).

The product of its digits is 1344, while the sum is 25.

The square root of 1671424 is about 1292.8356430730. The cubic root of 1671424 is about 118.6758118329.

The spelling of 1671424 in words is "one million, six hundred seventy-one thousand, four hundred twenty-four".