9012161 has 4 divisors (see below), whose sum is σ = 9019824. Its totient is φ = 9004500.

The previous prime is 9012149. The next prime is 9012181. The reversal of 9012161 is 1612109.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1612109 = 83 ⋅19423.

It is a cyclic number.

It is not a de Polignac number, because 9012161 - 2⁶ = 9012097 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9012121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1655 + ... + 4556.

It is an arithmetic number, because the mean of its divisors is an integer number (2254956).

Almost surely, 2^9012161 is an apocalyptic number.

It is an amenable number.

9012161 is a deficient number, since it is larger than the sum of its proper divisors (7663).

9012161 is a wasteful number, since it uses less digits than its factorization.

9012161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7662.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 9012161 is about 3002.0261491200. The cubic root of 9012161 is about 208.1020286550.

The spelling of 9012161 in words is "nine million, twelve thousand, one hundred sixty-one".