16191242 has 16 divisors (see below), whose sum is σ = 25796232. Its totient is φ = 7595520.

The previous prime is 16191223. The next prime is 16191247. The reversal of 16191242 is 24219161.

It can be written as a sum of positive squares in 4 ways, for example, as 16168441 + 22801 = 4021^2 + 151^2 .

It is not an unprimeable number, because it can be changed into a prime (16191247) 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 7 ways as a sum of consecutive naturals, for example, 15158 + ... + 16190.

Almost surely, 2^16191242 is an apocalyptic number.

16191242 is a deficient number, since it is larger than the sum of its proper divisors (9604990).

16191242 is a wasteful number, since it uses less digits than its factorization.

16191242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513.

The product of its digits is 864, while the sum is 26.

The square root of 16191242 is about 4023.8342411188. The cubic root of 16191242 is about 252.9841939435.

The spelling of 16191242 in words is "sixteen million, one hundred ninety-one thousand, two hundred forty-two".