1665030 has 16 divisors (see below), whose sum is σ = 3996144. Its totient is φ = 444000.

The previous prime is 1665029. The next prime is 1665043. The reversal of 1665030 is 305661.

It is a junction number, because it is equal to n+sod(n) for n = 1664988 and 1665006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27721 + ... + 27780.

It is an arithmetic number, because the mean of its divisors is an integer number (249759).

2^1665030 is an apocalyptic number.

1665030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1665030 is an abundant number, since it is smaller than the sum of its proper divisors (2331114).

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

1665030 is a wasteful number, since it uses less digits than its factorization.

1665030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55511.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 1665030 is about 1290.3604147679. The cubic root of 1665030 is about 118.5242877810.

It can be divided in two parts, 16650 and 30, that multiplied together give a triangular number (499500 = T₉₉₉).

The spelling of 1665030 in words is "one million, six hundred sixty-five thousand, thirty".