1620260 has 12 divisors (see below), whose sum is σ = 3402588. Its totient is φ = 648096.

The previous prime is 1620257. The next prime is 1620271. The reversal of 1620260 is 620261.

It can be written as a sum of positive squares in 2 ways, for example, as 256036 + 1364224 = 506^2 + 1168^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40487 + ... + 40526.

It is an arithmetic number, because the mean of its divisors is an integer number (283549).

2^1620260 is an apocalyptic number.

1620260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1620260 is an abundant number, since it is smaller than the sum of its proper divisors (1782328).

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

1620260 is a wasteful number, since it uses less digits than its factorization.

1620260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81022 (or 81020 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1620260 is about 1272.8943396842. The cubic root of 1620260 is about 117.4523120199.

Subtracting from 1620260 its reverse (620261), we obtain a palindrome (999999).

The spelling of 1620260 in words is "one million, six hundred twenty thousand, two hundred sixty".