1662500 has 72 divisors (see below), whose sum is σ = 4374720. Its totient is φ = 540000.

The previous prime is 1662491. The next prime is 1662503. The reversal of 1662500 is 52661.

It is a sliding number, since 1662500 = 62500 + 1600000 and 1/62500 + 1/1600000 = 0.00001662500.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (1662503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87491 + ... + 87509.

It is an arithmetic number, because the mean of its divisors is an integer number (60760).

2^1662500 is an apocalyptic number.

1662500 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 1662500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2187360).

1662500 is an abundant number, since it is smaller than the sum of its proper divisors (2712220).

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

1662500 is an equidigital number, since it uses as much as digits as its factorization.

1662500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55 (or 33 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1662500 is about 1289.3796958228. The cubic root of 1662500 is about 118.4642251078.

It can be divided in two parts, 16 and 62500, that multiplied together give a 6-th power (1000000 = 10⁶).

The spelling of 1662500 in words is "one million, six hundred sixty-two thousand, five hundred".