16912161 has 24 divisors (see below), whose sum is σ = 29562624. Its totient is φ = 9095040.

The previous prime is 16912157. The next prime is 16912169. The reversal of 16912161 is 16121961.

It is not a de Polignac number, because 16912161 - 2² = 16912157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16912169) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6825 + ... + 8966.

It is an arithmetic number, because the mean of its divisors is an integer number (1231776).

Almost surely, 2^16912161 is an apocalyptic number.

It is an amenable number.

16912161 is a deficient number, since it is larger than the sum of its proper divisors (12650463).

16912161 is a wasteful number, since it uses less digits than its factorization.

16912161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15821 (or 15818 counting only the distinct ones).

The product of its digits is 648, while the sum is 27.

The square root of 16912161 is about 4112.4397867932. The cubic root of 16912161 is about 256.6845337162.

The spelling of 16912161 in words is "sixteen million, nine hundred twelve thousand, one hundred sixty-one".