1659420 has 96 divisors (see below), whose sum is σ = 5913600. Its totient is φ = 378432.

The previous prime is 1659407. The next prime is 1659431. The reversal of 1659420 is 249561.

1659420 is a `hidden beast` number, since 1 + 659 + 4 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3561 + ... + 3999.

It is an arithmetic number, because the mean of its divisors is an integer number (61600).

2^1659420 is an apocalyptic number.

1659420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1659420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2956800).

1659420 is an abundant number, since it is smaller than the sum of its proper divisors (4254180).

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

1659420 is a wasteful number, since it uses less digits than its factorization.

1659420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464 (or 456 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1659420 is about 1288.1847693557. The cubic root of 1659420 is about 118.3910230289.

The spelling of 1659420 in words is "one million, six hundred fifty-nine thousand, four hundred twenty".