1217532340 has 48 divisors (see below), whose sum is σ = 2584612800. Its totient is φ = 481744640.

The previous prime is 1217532313. The next prime is 1217532341. The reversal of 1217532340 is 432357121.

It is a junction number, because it is equal to n+sod(n) for n = 1217532299 and 1217532308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217532341) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1160136 + ... + 1161184.

It is an arithmetic number, because the mean of its divisors is an integer number (53846100).

Almost surely, 2^1217532340 is an apocalyptic number.

1217532340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1217532340 is an abundant number, since it is smaller than the sum of its proper divisors (1367080460).

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

1217532340 is a wasteful number, since it uses less digits than its factorization.

1217532340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632 (or 1630 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 1217532340 is about 34893.1560624716. The cubic root of 1217532340 is about 1067.8088154367.

Adding to 1217532340 its reverse (432357121), we get a palindrome (1649889461).

The spelling of 1217532340 in words is "one billion, two hundred seventeen million, five hundred thirty-two thousand, three hundred forty".