19001242 has 16 divisors (see below), whose sum is σ = 31275720. Its totient is φ = 8603712.

The previous prime is 19001219. The next prime is 19001249. The reversal of 19001242 is 24210091.

It can be written as a sum of positive squares in 4 ways, for example, as 18481401 + 519841 = 4299^2 + 721^2 .

It is a super-2 number, since 2×19001242² = 722094395085128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19001249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5517 + ... + 8272.

Almost surely, 2^19001242 is an apocalyptic number.

19001242 is a deficient number, since it is larger than the sum of its proper divisors (12274478).

19001242 is a wasteful number, since it uses less digits than its factorization.

19001242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13857.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 19001242 is about 4359.0414083833. The cubic root of 19001242 is about 266.8459790523.

The spelling of 19001242 in words is "nineteen million, one thousand, two hundred forty-two".