2081505 has 16 divisors (see below), whose sum is σ = 3352320. Its totient is φ = 1102848.

The previous prime is 2081491. The next prime is 2081537. The reversal of 2081505 is 5051802.

It is not a de Polignac number, because 2081505 - 2⁵ = 2081473 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2536 + ... + 3254.

It is an arithmetic number, because the mean of its divisors is an integer number (209520).

2^2081505 is an apocalyptic number.

It is an amenable number.

2081505 is a deficient number, since it is larger than the sum of its proper divisors (1270815).

2081505 is a wasteful number, since it uses less digits than its factorization.

2081505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 2081505 is about 1442.7421807101. The cubic root of 2081505 is about 127.6808659552.

The spelling of 2081505 in words is "two million, eighty-one thousand, five hundred five".