1305161 has 8 divisors (see below), whose sum is σ = 1533504. Its totient is φ = 1095120.

The previous prime is 1305151. The next prime is 1305163. The reversal of 1305161 is 1615031.

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

It is not a de Polignac number, because 1305161 - 2⁶ = 1305097 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1305163) 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, 4421 + ... + 4706.

It is an arithmetic number, because the mean of its divisors is an integer number (191688).

2^1305161 is an apocalyptic number.

1305161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1305161 is a deficient number, since it is larger than the sum of its proper divisors (228343).

1305161 is a wasteful number, since it uses less digits than its factorization.

1305161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9151.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 1305161 is about 1142.4364314919. The cubic root of 1305161 is about 109.2835252588.

The spelling of 1305161 in words is "one million, three hundred five thousand, one hundred sixty-one".