1656120 has 64 divisors (see below), whose sum is σ = 5116320. Its totient is φ = 428544.

The previous prime is 1656119. The next prime is 1656121. The reversal of 1656120 is 216561.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1656119) and next prime (1656121).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1656121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4254 + ... + 4626.

2^1656120 is an apocalyptic number.

1656120 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 1656120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2558160).

1656120 is an abundant number, since it is smaller than the sum of its proper divisors (3460200).

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

1656120 is a wasteful number, since it uses less digits than its factorization.

1656120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424 (or 420 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1656120 is about 1286.9032597674. The cubic root of 1656120 is about 118.3124916456.

The spelling of 1656120 in words is "one million, six hundred fifty-six thousand, one hundred twenty".