19215242 has 8 divisors (see below), whose sum is σ = 28906500. Its totient is φ = 9579744.

The previous prime is 19215239. The next prime is 19215263. The reversal of 19215242 is 24251291.

It can be written as a sum of positive squares in 2 ways, for example, as 19175641 + 39601 = 4379^2 + 199^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13067 + ... + 14462.

Almost surely, 2^19215242 is an apocalyptic number.

19215242 is a deficient number, since it is larger than the sum of its proper divisors (9691258).

19215242 is a wasteful number, since it uses less digits than its factorization.

19215242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27880.

The product of its digits is 1440, while the sum is 26.

The square root of 19215242 is about 4383.5193623389. The cubic root of 19215242 is about 267.8440189092.

The spelling of 19215242 in words is "nineteen million, two hundred fifteen thousand, two hundred forty-two".