16657242 has 16 divisors (see below), whose sum is σ = 38073792. Its totient is φ = 4759200.

The previous prime is 16657237. The next prime is 16657247. The reversal of 16657242 is 24275661.

It is an interprime number because it is at equal distance from previous prime (16657237) and next prime (16657247).

It is a super-4 number, since 4×16657242⁴ (a number of 30 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (16657247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198259 + ... + 198342.

It is an arithmetic number, because the mean of its divisors is an integer number (2379612).

Almost surely, 2^16657242 is an apocalyptic number.

16657242 is an abundant number, since it is smaller than the sum of its proper divisors (21416550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16657242 is a wasteful number, since it uses less digits than its factorization.

16657242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396613.

The product of its digits is 20160, while the sum is 33.

The square root of 16657242 is about 4081.3284601953. The cubic root of 16657242 is about 255.3883203130.

The spelling of 16657242 in words is "sixteen million, six hundred fifty-seven thousand, two hundred forty-two".