1481805 has 48 divisors (see below), whose sum is σ = 2948400. Its totient is φ = 681984.

The previous prime is 1481801. The next prime is 1481819. The reversal of 1481805 is 5081841.

1481805 = T₄₀₉ + T₄₁₀ + ... + T₄₂₅.

It can be written as a sum of positive squares in 8 ways, for example, as 161604 + 1320201 = 402^2 + 1149^2 .

It is not a de Polignac number, because 1481805 - 2² = 1481801 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1481801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9871 + ... + 10019.

It is an arithmetic number, because the mean of its divisors is an integer number (61425).

2^1481805 is an apocalyptic number.

1481805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1481805 is a deficient number, since it is larger than the sum of its proper divisors (1466595).

1481805 is a wasteful number, since it uses less digits than its factorization.

1481805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 1481805 is about 1217.2941304385. The cubic root of 1481805 is about 114.0066939744.

It can be divided in two parts, 148 and 1805, that added together give a triangular number (1953 = T₆₂).

The spelling of 1481805 in words is "one million, four hundred eighty-one thousand, eight hundred five".