16442745 has 32 divisors (see below), whose sum is σ = 28892160. Its totient is φ = 7919040.

The previous prime is 16442737. The next prime is 16442749. The reversal of 16442745 is 54724461.

It is not a de Polignac number, because 16442745 - 2³ = 16442737 is a prime.

It is a super-3 number, since 3×16442745³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16442749) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37236 + ... + 37674.

It is an arithmetic number, because the mean of its divisors is an integer number (902880).

Almost surely, 2^16442745 is an apocalyptic number.

16442745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16442745 is a deficient number, since it is larger than the sum of its proper divisors (12449415).

16442745 is a wasteful number, since it uses less digits than its factorization.

16442745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685.

The product of its digits is 26880, while the sum is 33.

The square root of 16442745 is about 4054.9654745756. The cubic root of 16442745 is about 254.2873605168.

The spelling of 16442745 in words is "sixteen million, four hundred forty-two thousand, seven hundred forty-five".