16642256 has 10 divisors (see below), whose sum is σ = 32244402. Its totient is φ = 8321120.

The previous prime is 16642253. The next prime is 16642313. The reversal of 16642256 is 65224661.

It can be written as a sum of positive squares in only one way, i.e., 14440000 + 2202256 = 3800^2 + 1484^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16642253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520055 + ... + 520086.

Almost surely, 2^16642256 is an apocalyptic number.

16642256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16642256 is a deficient number, since it is larger than the sum of its proper divisors (15602146).

16642256 is a wasteful number, since it uses less digits than its factorization.

16642256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040149 (or 1040143 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 16642256 is about 4079.4921252528. The cubic root of 16642256 is about 255.3117090369.

The spelling of 16642256 in words is "sixteen million, six hundred forty-two thousand, two hundred fifty-six".