16442971 has 4 divisors (see below), whose sum is σ = 17010000. Its totient is φ = 15875944.

The previous prime is 16442963. The next prime is 16442983. The reversal of 16442971 is 17924461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16442971 - 2³ = 16442963 is a prime.

It is a super-3 number, since 3×16442971³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16442941) 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, 283471 + ... + 283528.

It is an arithmetic number, because the mean of its divisors is an integer number (4252500).

Almost surely, 2^16442971 is an apocalyptic number.

16442971 is a deficient number, since it is larger than the sum of its proper divisors (567029).

16442971 is an equidigital number, since it uses as much as digits as its factorization.

16442971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567028.

The product of its digits is 12096, while the sum is 34.

The square root of 16442971 is about 4054.9933415482. The cubic root of 16442971 is about 254.2885255429.

The spelling of 16442971 in words is "sixteen million, four hundred forty-two thousand, nine hundred seventy-one".