16194425 has 18 divisors (see below), whose sum is σ = 21750282. Its totient is φ = 11955840.

The previous prime is 16194413. The next prime is 16194427. The reversal of 16194425 is 52449161.

It can be written as a sum of positive squares in 9 ways, for example, as 12538681 + 3655744 = 3541^2 + 1912^2 .

It is not a de Polignac number, because 16194425 - 2⁶ = 16194361 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16194391 and 16194400.

It is not an unprimeable number, because it can be changed into a prime (16194427) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2309 + ... + 6141.

It is an arithmetic number, because the mean of its divisors is an integer number (1208349).

Almost surely, 2^16194425 is an apocalyptic number.

It is an amenable number.

16194425 is a deficient number, since it is larger than the sum of its proper divisors (5555857).

16194425 is a wasteful number, since it uses less digits than its factorization.

16194425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3869 (or 3851 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 16194425 is about 4024.2297399627. The cubic root of 16194425 is about 253.0007707226. Note that the first 3 decimals are identical.

The spelling of 16194425 in words is "sixteen million, one hundred ninety-four thousand, four hundred twenty-five".