16442187 has 8 divisors (see below), whose sum is σ = 21942336. Its totient is φ = 10951752.

The previous prime is 16442177. The next prime is 16442197. The reversal of 16442187 is 78124461.

It is an interprime number because it is at equal distance from previous prime (16442177) and next prime (16442197).

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

It is a de Polignac number, because none of the positive numbers 2^k-16442187 is a prime.

It is a super-3 number, since 3×16442187³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (16442147) 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, 3828 + ... + 6894.

It is an arithmetic number, because the mean of its divisors is an integer number (2742792).

Almost surely, 2^16442187 is an apocalyptic number.

16442187 is a deficient number, since it is larger than the sum of its proper divisors (5500149).

16442187 is a wasteful number, since it uses less digits than its factorization.

16442187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4857.

The product of its digits is 10752, while the sum is 33.

The square root of 16442187 is about 4054.8966694603. The cubic root of 16442187 is about 254.2844839908.

The spelling of 16442187 in words is "sixteen million, four hundred forty-two thousand, one hundred eighty-seven".