16971625 has 16 divisors (see below), whose sum is σ = 23107968. Its totient is φ = 12342000.

The previous prime is 16971623. The next prime is 16971637. The reversal of 16971625 is 52617961.

It is not a de Polignac number, because 16971625 - 2¹ = 16971623 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16971623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4797 + ... + 7546.

It is an arithmetic number, because the mean of its divisors is an integer number (1444248).

Almost surely, 2^16971625 is an apocalyptic number.

It is an amenable number.

16971625 is a deficient number, since it is larger than the sum of its proper divisors (6136343).

16971625 is a wasteful number, since it uses less digits than its factorization.

16971625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12369 (or 12359 counting only the distinct ones).

The product of its digits is 22680, while the sum is 37.

The square root of 16971625 is about 4119.6632143902. The cubic root of 16971625 is about 256.9850203485.

The spelling of 16971625 in words is "sixteen million, nine hundred seventy-one thousand, six hundred twenty-five".