1217502745 has 16 divisors (see below), whose sum is σ = 1477262592. Its totient is φ = 963190080.

The previous prime is 1217502743. The next prime is 1217502763. The reversal of 1217502745 is 5472057121.

It is not a de Polignac number, because 1217502745 - 2¹ = 1217502743 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1217502745.

It is not an unprimeable number, because it can be changed into a prime (1217502743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 529819 + ... + 532111.

It is an arithmetic number, because the mean of its divisors is an integer number (92328912).

Almost surely, 2^1217502745 is an apocalyptic number.

It is an amenable number.

1217502745 is a deficient number, since it is larger than the sum of its proper divisors (259759847).

1217502745 is a wasteful number, since it uses less digits than its factorization.

1217502745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3432.

The product of its (nonzero) digits is 19600, while the sum is 34.

The square root of 1217502745 is about 34892.7319795971. The cubic root of 1217502745 is about 1067.8001634946.

Adding to 1217502745 its reverse (5472057121), we get a palindrome (6689559866).

The spelling of 1217502745 in words is "one billion, two hundred seventeen million, five hundred two thousand, seven hundred forty-five".