1217307129 has 16 divisors (see below), whose sum is σ = 1647206400. Its totient is φ = 799518096.

The previous prime is 1217307107. The next prime is 1217307139. The reversal of 1217307129 is 9217037121.

It is not a de Polignac number, because 1217307129 - 2⁷ = 1217307001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1217307129.

It is not an unprimeable number, because it can be changed into a prime (1217307139) 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, 108162 + ... + 118884.

It is an arithmetic number, because the mean of its divisors is an integer number (102950400).

Almost surely, 2^1217307129 is an apocalyptic number.

It is an amenable number.

1217307129 is a deficient number, since it is larger than the sum of its proper divisors (429899271).

1217307129 is a wasteful number, since it uses less digits than its factorization.

1217307129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11284.

The product of its (nonzero) digits is 5292, while the sum is 33.

The square root of 1217307129 is about 34889.9287617501. The cubic root of 1217307129 is about 1067.7429726626.

The spelling of 1217307129 in words is "one billion, two hundred seventeen million, three hundred seven thousand, one hundred twenty-nine".