1217172304 has 10 divisors (see below), whose sum is σ = 2358271370. Its totient is φ = 608586144.

The previous prime is 1217172293. The next prime is 1217172323. The reversal of 1217172304 is 4032717121.

It can be written as a sum of positive squares in only one way, i.e., 1187491600 + 29680704 = 34460^2 + 5448^2 .

It is a congruent number.

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 as a sum of consecutive naturals, namely, 38036619 + ... + 38036650.

It is an arithmetic number, because the mean of its divisors is an integer number (235827137).

Almost surely, 2^1217172304 is an apocalyptic number.

It is an amenable number.

1217172304 is a deficient number, since it is larger than the sum of its proper divisors (1141099066).

1217172304 is an equidigital number, since it uses as much as digits as its factorization.

1217172304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76073277 (or 76073271 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 1217172304 is about 34887.9965604218. The cubic root of 1217172304 is about 1067.7035512879.

Adding to 1217172304 its reverse (4032717121), we get a palindrome (5249889425).

The spelling of 1217172304 in words is "one billion, two hundred seventeen million, one hundred seventy-two thousand, three hundred four".