16172961 has 16 divisors (see below), whose sum is σ = 24700800. Its totient is φ = 9220608.

The previous prime is 16172953. The next prime is 16172963. The reversal of 16172961 is 16927161.

It is not a de Polignac number, because 16172961 - 2³ = 16172953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16172963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16945 + ... + 17873.

It is an arithmetic number, because the mean of its divisors is an integer number (1543800).

Almost surely, 2^16172961 is an apocalyptic number.

It is an amenable number.

16172961 is a deficient number, since it is larger than the sum of its proper divisors (8527839).

16172961 is an equidigital number, since it uses as much as digits as its factorization.

16172961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768.

The product of its digits is 4536, while the sum is 33.

The square root of 16172961 is about 4021.5620099658. The cubic root of 16172961 is about 252.8889460369. Note that the first 3 decimals are identical.

The spelling of 16172961 in words is "sixteen million, one hundred seventy-two thousand, nine hundred sixty-one".