1217050240 has 144 divisors (see below), whose sum is σ = 3401800470. Its totient is φ = 415156224.

The previous prime is 1217050217. The next prime is 1217050253. The reversal of 1217050240 is 420507121.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1178411584 + 38638656 = 34328^2 + 6216^2 .

It is a super-2 number, since 2×1217050240² = 2962422573368115200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6177822 + ... + 6178018.

Almost surely, 2^1217050240 is an apocalyptic number.

1217050240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1217050240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1700900235).

1217050240 is an abundant number, since it is smaller than the sum of its proper divisors (2184750230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1217050240 is an frugal number, since it uses more digits than its factorization.

1217050240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 1217050240 is about 34886.2471469776. The cubic root of 1217050240 is about 1067.6678585809.

Adding to 1217050240 its reverse (420507121), we get a palindrome (1637557361).

The spelling of 1217050240 in words is "one billion, two hundred seventeen million, fifty thousand, two hundred forty".