1801560 has 32 divisors (see below), whose sum is σ = 5405040. Its totient is φ = 480384.

The previous prime is 1801549. The next prime is 1801577. The reversal of 1801560 is 651081.

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 7 ways as a sum of consecutive naturals, for example, 7387 + ... + 7626.

2^1801560 is an apocalyptic number.

1801560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1801560 is an abundant number, since it is smaller than the sum of its proper divisors (3603480).

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

1801560 is a wasteful number, since it uses less digits than its factorization.

1801560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15027 (or 15023 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 1801560 is about 1342.2220382634. Note that the first 3 decimals coincide. The cubic root of 1801560 is about 121.6791713759.

The spelling of 1801560 in words is "one million, eight hundred one thousand, five hundred sixty".