1220734129 has 2 divisors, whose sum is σ = 1220734130. Its totient is φ = 1220734128.

The previous prime is 1220734127. The next prime is 1220734153. The reversal of 1220734129 is 9214370221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 794394225 + 426339904 = 28185^2 + 20648^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220734129 - 2¹ = 1220734127 is a prime.

Together with 1220734127, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1220734129.

It is not a weakly prime, because it can be changed into another prime (1220734127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610367064 + 610367065.

It is an arithmetic number, because the mean of its divisors is an integer number (610367065).

Almost surely, 2^1220734129 is an apocalyptic number.

It is an amenable number.

1220734129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220734129 is an equidigital number, since it uses as much as digits as its factorization.

1220734129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 1220734129 is about 34939.0058387470. The cubic root of 1220734129 is about 1068.7440146764.

The spelling of 1220734129 in words is "one billion, two hundred twenty million, seven hundred thirty-four thousand, one hundred twenty-nine".