1217940459 has 8 divisors (see below), whose sum is σ = 1694525952. Its totient is φ = 776657640.

The previous prime is 1217940331. The next prime is 1217940473. The reversal of 1217940459 is 9540497121.

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

It is not a de Polignac number, because 1217940459 - 2⁷ = 1217940331 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1217940459.

It is not an unprimeable number, because it can be changed into a prime (1217940259) 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, 8825587 + ... + 8825724.

It is an arithmetic number, because the mean of its divisors is an integer number (211815744).

Almost surely, 2^1217940459 is an apocalyptic number.

1217940459 is a deficient number, since it is larger than the sum of its proper divisors (476585493).

1217940459 is a wasteful number, since it uses less digits than its factorization.

1217940459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17651337.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 1217940459 is about 34899.0036963808. The cubic root of 1217940459 is about 1067.9281125778.

The spelling of 1217940459 in words is "one billion, two hundred seventeen million, nine hundred forty thousand, four hundred fifty-nine".