1620500 has 48 divisors (see below), whose sum is σ = 4053504. Its totient is φ = 554400.

The previous prime is 1620497. The next prime is 1620517. The reversal of 1620500 is 50261.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3269 + ... + 3731.

It is an arithmetic number, because the mean of its divisors is an integer number (84448).

2^1620500 is an apocalyptic number.

1620500 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 1620500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2026752).

1620500 is an abundant number, since it is smaller than the sum of its proper divisors (2433004).

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

1620500 is a wasteful number, since it uses less digits than its factorization.

1620500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489 (or 477 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 1620500 is about 1272.9886095327. The cubic root of 1620500 is about 117.4581109170.

Adding to 1620500 its reverse (50261), we get a palindrome (1670761).

It can be divided in two parts, 1620 and 500, that multiplied together give a 4-th power (810000 = 30⁴).

The spelling of 1620500 in words is "one million, six hundred twenty thousand, five hundred".