16925081 has 4 divisors (see below), whose sum is σ = 17920692. Its totient is φ = 15929472.

The previous prime is 16925053. The next prime is 16925093. The reversal of 16925081 is 18052961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18052961 = 97 ⋅186113.

It can be written as a sum of positive squares in 2 ways, for example, as 5929225 + 10995856 = 2435^2 + 3316^2 .

It is a cyclic number.

It is not a de Polignac number, because 16925081 - 2⁶ = 16925017 is a prime.

It is a super-2 number, since 2×16925081² = 572916733713122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16925281) 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, 497780 + ... + 497813.

It is an arithmetic number, because the mean of its divisors is an integer number (4480173).

Almost surely, 2^16925081 is an apocalyptic number.

It is an amenable number.

16925081 is a deficient number, since it is larger than the sum of its proper divisors (995611).

16925081 is an equidigital number, since it uses as much as digits as its factorization.

16925081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995610.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 16925081 is about 4114.0103305655. The cubic root of 16925081 is about 256.7498815651.

The spelling of 16925081 in words is "sixteen million, nine hundred twenty-five thousand, eighty-one".