1284217442 has 8 divisors (see below), whose sum is σ = 1926528300. Its totient is φ = 642041344.

The previous prime is 1284217433. The next prime is 1284217447. The reversal of 1284217442 is 2447124821.

It can be written as a sum of positive squares in 2 ways, for example, as 1276704361 + 7513081 = 35731^2 + 2741^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1284217447) 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, 4967 + ... + 50922.

Almost surely, 2^1284217442 is an apocalyptic number.

1284217442 is a deficient number, since it is larger than the sum of its proper divisors (642310858).

1284217442 is a wasteful number, since it uses less digits than its factorization.

1284217442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67380.

The product of its digits is 28672, while the sum is 35.

The square root of 1284217442 is about 35835.9797131319. The cubic root of 1284217442 is about 1086.9582287930.

The spelling of 1284217442 in words is "one billion, two hundred eighty-four million, two hundred seventeen thousand, four hundred forty-two".