1660424 has 32 divisors (see below), whose sum is σ = 3418200. Its totient is φ = 752640.

The previous prime is 1660423. The next prime is 1660433. The reversal of 1660424 is 4240661.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1144900 + 515524 = 1070^2 + 718^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1660424.

It is not an unprimeable number, because it can be changed into a prime (1660423) 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, 3734 + ... + 4154.

2^1660424 is an apocalyptic number.

It is an amenable number.

1660424 is an abundant number, since it is smaller than the sum of its proper divisors (1757776).

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

1660424 is a wasteful number, since it uses less digits than its factorization.

1660424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473 (or 469 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1660424 is about 1288.5744060783. The cubic root of 1660424 is about 118.4148949486.

The spelling of 1660424 in words is "one million, six hundred sixty thousand, four hundred twenty-four".