19257242 has 16 divisors (see below), whose sum is σ = 29784552. Its totient is φ = 9331200.

The previous prime is 19257229. The next prime is 19257253. The reversal of 19257242 is 24275291.

It can be written as a sum of positive squares in 4 ways, for example, as 18498601 + 758641 = 4301^2 + 871^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19257199 and 19257208.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31742 + ... + 32342.

Almost surely, 2^19257242 is an apocalyptic number.

19257242 is a deficient number, since it is larger than the sum of its proper divisors (10527310).

19257242 is a wasteful number, since it uses less digits than its factorization.

19257242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073.

The product of its digits is 10080, while the sum is 32.

The square root of 19257242 is about 4388.3074185841. The cubic root of 19257242 is about 268.0390249104.

The spelling of 19257242 in words is "nineteen million, two hundred fifty-seven thousand, two hundred forty-two".