8161481 has 4 divisors (see below), whose sum is σ = 8516352. Its totient is φ = 7806612.

The previous prime is 8161477. The next prime is 8161487. The reversal of 8161481 is 1841618.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8161481 - 2² = 8161477 is a prime.

It is a super-2 number, since 2×8161481² = 133219544226722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8161487) 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 3 ways as a sum of consecutive naturals, for example, 177401 + ... + 177446.

It is an arithmetic number, because the mean of its divisors is an integer number (2129088).

Almost surely, 2^8161481 is an apocalyptic number.

It is an amenable number.

8161481 is a deficient number, since it is larger than the sum of its proper divisors (354871).

8161481 is a wasteful number, since it uses less digits than its factorization.

8161481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354870.

The product of its digits is 1536, while the sum is 29.

The square root of 8161481 is about 2856.8305865067. The cubic root of 8161481 is about 201.3367209811.

The spelling of 8161481 in words is "eight million, one hundred sixty-one thousand, four hundred eighty-one".