16140405 has 16 divisors (see below), whose sum is σ = 27184320. Its totient is φ = 8155008.

The previous prime is 16140403. The next prime is 16140413. The reversal of 16140405 is 50404161.

It is not a de Polignac number, because 16140405 - 2¹ = 16140403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16140403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28032 + ... + 28601.

It is an arithmetic number, because the mean of its divisors is an integer number (1699020).

Almost surely, 2^16140405 is an apocalyptic number.

16140405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16140405 is a deficient number, since it is larger than the sum of its proper divisors (11043915).

16140405 is a wasteful number, since it uses less digits than its factorization.

16140405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56660.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 16140405 is about 4017.5122899625. The cubic root of 16140405 is about 252.7191444555.

Adding to 16140405 its reverse (50404161), we get a palindrome (66544566).

The spelling of 16140405 in words is "sixteen million, one hundred forty thousand, four hundred five".