16725138 has 32 divisors (see below), whose sum is σ = 34504704. Its totient is φ = 5401872.

The previous prime is 16725119. The next prime is 16725139. The reversal of 16725138 is 83152761.

It is a super-2 number, since 2×16725138² = 559460482238088, which contains 22 as substring.

It is a nialpdrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 16725099 and 16725108.

It is not an unprimeable number, because it can be changed into a prime (16725139) 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, 35581 + ... + 36047.

It is an arithmetic number, because the mean of its divisors is an integer number (1078272).

Almost surely, 2^16725138 is an apocalyptic number.

16725138 is an abundant number, since it is smaller than the sum of its proper divisors (17779566).

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

16725138 is a wasteful number, since it uses less digits than its factorization.

16725138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646.

The product of its digits is 10080, while the sum is 33.

The square root of 16725138 is about 4089.6378812800. The cubic root of 16725138 is about 255.7348430478.

Adding to 16725138 its reverse (83152761), we get a palindrome (99877899).

The spelling of 16725138 in words is "sixteen million, seven hundred twenty-five thousand, one hundred thirty-eight".