1217164730 has 32 divisors (see below), whose sum is σ = 2217453840. Its totient is φ = 480983040.

The previous prime is 1217164723. The next prime is 1217164733. The reversal of 1217164730 is 374617121.

It can be written as a sum of positive squares in 8 ways, for example, as 932264089 + 284900641 = 30533^2 + 16879^2 .

It is not an unprimeable number, because it can be changed into a prime (1217164733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 989756 + ... + 990984.

Almost surely, 2^1217164730 is an apocalyptic number.

1217164730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1217164730 is a deficient number, since it is larger than the sum of its proper divisors (1000289110).

1217164730 is a wasteful number, since it uses less digits than its factorization.

1217164730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2354.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 1217164730 is about 34887.8880128907. Note that the first 3 decimals coincide. The cubic root of 1217164730 is about 1067.7013366457.

The spelling of 1217164730 in words is "one billion, two hundred seventeen million, one hundred sixty-four thousand, seven hundred thirty".