2081545 has 8 divisors (see below), whose sum is σ = 2629440. Its totient is φ = 1577520.

The previous prime is 2081537. The next prime is 2081549. The reversal of 2081545 is 5451802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2081545 - 2³ = 2081537 is a prime.

2081545 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2081549) 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 7 ways as a sum of consecutive naturals, for example, 10861 + ... + 11050.

It is an arithmetic number, because the mean of its divisors is an integer number (328680).

2^2081545 is an apocalyptic number.

It is an amenable number.

2081545 is a deficient number, since it is larger than the sum of its proper divisors (547895).

2081545 is a wasteful number, since it uses less digits than its factorization.

2081545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21935.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 2081545 is about 1442.7560431341. The cubic root of 2081545 is about 127.6816838253.

The spelling of 2081545 in words is "two million, eighty-one thousand, five hundred forty-five".