1217983142 has 8 divisors (see below), whose sum is σ = 1861446096. Its totient is φ = 597501112.

The previous prime is 1217983141. The next prime is 1217983153. The reversal of 1217983142 is 2413897121.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1217983096 and 1217983105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217983141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5745098 + ... + 5745309.

It is an arithmetic number, because the mean of its divisors is an integer number (232680762).

Almost surely, 2^1217983142 is an apocalyptic number.

1217983142 is a deficient number, since it is larger than the sum of its proper divisors (643462954).

1217983142 is a wasteful number, since it uses less digits than its factorization.

1217983142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11490462.

The product of its digits is 24192, while the sum is 38.

The square root of 1217983142 is about 34899.6152127785. The cubic root of 1217983142 is about 1067.9405876931.

The spelling of 1217983142 in words is "one billion, two hundred seventeen million, nine hundred eighty-three thousand, one hundred forty-two".