1242819717 has 8 divisors (see below), whose sum is σ = 1666672224. Its totient is φ = 823756848.

The previous prime is 1242819653. The next prime is 1242819727. The reversal of 1242819717 is 7179182421.

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

It is not a de Polignac number, because 1242819717 - 2⁶ = 1242819653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242819727) 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, 1196803 + ... + 1197840.

It is an arithmetic number, because the mean of its divisors is an integer number (208334028).

Almost surely, 2^1242819717 is an apocalyptic number.

It is an amenable number.

1242819717 is a deficient number, since it is larger than the sum of its proper divisors (423852507).

1242819717 is a wasteful number, since it uses less digits than its factorization.

1242819717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2394819.

The product of its digits is 56448, while the sum is 42.

The square root of 1242819717 is about 35253.6482792916. The cubic root of 1242819717 is about 1075.1507895924.

The spelling of 1242819717 in words is "one billion, two hundred forty-two million, eight hundred nineteen thousand, seven hundred seventeen".