19115242 has 16 divisors (see below), whose sum is σ = 30705480. Its totient is φ = 8892928.

The previous prime is 19115227. The next prime is 19115279. The reversal of 19115242 is 24251191.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16329681 + 2785561 = 4041^2 + 1669^2 .

It is an unprimeable number.

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, 133 + ... + 6184.

Almost surely, 2^19115242 is an apocalyptic number.

19115242 is a deficient number, since it is larger than the sum of its proper divisors (11590238).

19115242 is a wasteful number, since it uses less digits than its factorization.

19115242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6425.

The product of its digits is 720, while the sum is 25.

The square root of 19115242 is about 4372.0981233271. The cubic root of 19115242 is about 267.3785724247.

The spelling of 19115242 in words is "nineteen million, one hundred fifteen thousand, two hundred forty-two".