1667424 has 48 divisors (see below), whose sum is σ = 4777920. Its totient is φ = 504960.

The previous prime is 1667423. The next prime is 1667441. The reversal of 1667424 is 4247661.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 1667391 and 1667400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1667423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267 + ... + 1845.

It is an arithmetic number, because the mean of its divisors is an integer number (99540).

2^1667424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1667424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2388960).

1667424 is an abundant number, since it is smaller than the sum of its proper divisors (3110496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1667424 is a wasteful number, since it uses less digits than its factorization.

1667424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603 (or 1595 counting only the distinct ones).

The product of its digits is 8064, while the sum is 30.

The square root of 1667424 is about 1291.2877293617. The cubic root of 1667424 is about 118.5810657893.

The spelling of 1667424 in words is "one million, six hundred sixty-seven thousand, four hundred twenty-four".