16721127 has 16 divisors (see below), whose sum is σ = 24860160. Its totient is φ = 11107800.

The previous prime is 16721119. The next prime is 16721141. The reversal of 16721127 is 72112761.

It is not a de Polignac number, because 16721127 - 2³ = 16721119 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 16721127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16721167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8002 + ... + 9872.

It is an arithmetic number, because the mean of its divisors is an integer number (1553760).

Almost surely, 2^16721127 is an apocalyptic number.

16721127 is a deficient number, since it is larger than the sum of its proper divisors (8139033).

16721127 is a wasteful number, since it uses less digits than its factorization.

16721127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2211 (or 2205 counting only the distinct ones).

The product of its digits is 1176, while the sum is 27.

The square root of 16721127 is about 4089.1474661597. The cubic root of 16721127 is about 255.7143980851.

Adding to 16721127 its reverse (72112761), we get a palindrome (88833888).

The spelling of 16721127 in words is "sixteen million, seven hundred twenty-one thousand, one hundred twenty-seven".