1305081 has 6 divisors (see below), whose sum is σ = 1885130. Its totient is φ = 870048.

The previous prime is 1305061. The next prime is 1305097. The reversal of 1305081 is 1805031.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 837225 + 467856 = 915^2 + 684^2 .

It is not a de Polignac number, because 1305081 - 2¹⁴ = 1288697 is a prime.

It is a super-2 number, since 2×1305081² = 3406472833122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1305011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72496 + ... + 72513.

2^1305081 is an apocalyptic number.

It is an amenable number.

1305081 is a deficient number, since it is larger than the sum of its proper divisors (580049).

1305081 is a wasteful number, since it uses less digits than its factorization.

1305081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145015 (or 145012 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1305081 is about 1142.4014180663. The cubic root of 1305081 is about 109.2812923642.

It can be divided in two parts, 13050 and 81, that added together give a palindrome (13131).

The spelling of 1305081 in words is "one million, three hundred five thousand, eighty-one".