1620795 has 48 divisors (see below), whose sum is σ = 3064320. Its totient is φ = 728640.

The previous prime is 1620769. The next prime is 1620803. The reversal of 1620795 is 5970261.

It is not a de Polignac number, because 1620795 - 2⁷ = 1620667 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34462 + ... + 34508.

It is an arithmetic number, because the mean of its divisors is an integer number (63840).

2^1620795 is an apocalyptic number.

1620795 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1620795 is a deficient number, since it is larger than the sum of its proper divisors (1443525).

1620795 is a wasteful number, since it uses less digits than its factorization.

1620795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 1620795 is about 1273.1044733250. The cubic root of 1620795 is about 117.4652379437.

It can be divided in two parts, 1620 and 795, that added together give a triangular number (2415 = T₆₉).

The spelling of 1620795 in words is "one million, six hundred twenty thousand, seven hundred ninety-five".