16091405 has 16 divisors (see below), whose sum is σ = 21155904. Its totient is φ = 11652480.

The previous prime is 16091399. The next prime is 16091407. The reversal of 16091405 is 50419061.

16091405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16091405 - 2⁴ = 16091389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16091407) 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, 16409 + ... + 17361.

It is an arithmetic number, because the mean of its divisors is an integer number (1322244).

Almost surely, 2^16091405 is an apocalyptic number.

It is an amenable number.

16091405 is a deficient number, since it is larger than the sum of its proper divisors (5064499).

16091405 is a wasteful number, since it uses less digits than its factorization.

16091405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 16091405 is about 4011.4093533321. The cubic root of 16091405 is about 252.4631452925.

The spelling of 16091405 in words is "sixteen million, ninety-one thousand, four hundred five".