1662520 has 32 divisors (see below), whose sum is σ = 3790800. Its totient is φ = 656128.

The previous prime is 1662517. The next prime is 1662527. The reversal of 1662520 is 252661.

It is a junction number, because it is equal to n+sod(n) for n = 1662491 and 1662500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3327 + ... + 3793.

2^1662520 is an apocalyptic number.

1662520 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 1662520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1895400).

1662520 is an abundant number, since it is smaller than the sum of its proper divisors (2128280).

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

1662520 is a wasteful number, since it uses less digits than its factorization.

1662520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567 (or 563 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1662520 is about 1289.3874514668. The cubic root of 1662520 is about 118.4647001504.

The spelling of 1662520 in words is "one million, six hundred sixty-two thousand, five hundred twenty".