16565242 has 8 divisors (see below), whose sum is σ = 26309556. Its totient is φ = 7795392.

The previous prime is 16565209. The next prime is 16565249. The reversal of 16565242 is 24256561.

It can be written as a sum of positive squares in 2 ways, for example, as 12243001 + 4322241 = 3499^2 + 2079^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (16565249) 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, 243573 + ... + 243640.

Almost surely, 2^16565242 is an apocalyptic number.

16565242 is a deficient number, since it is larger than the sum of its proper divisors (9744314).

16565242 is a wasteful number, since it uses less digits than its factorization.

16565242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487232.

The product of its digits is 14400, while the sum is 31.

The square root of 16565242 is about 4070.0420145252. The cubic root of 16565242 is about 254.9172716387.

It can be divided in two parts, 16565 and 242, that added together give a 5-th power (16807 = 7⁵).

The spelling of 16565242 in words is "sixteen million, five hundred sixty-five thousand, two hundred forty-two".