1229947141 has 2 divisors, whose sum is σ = 1229947142. Its totient is φ = 1229947140.

The previous prime is 1229947123. The next prime is 1229947177. The reversal of 1229947141 is 1417499221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1228853025 + 1094116 = 35055^2 + 1046^2 .

It is an emirp because it is prime and its reverse (1417499221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1229947141 - 2¹³ = 1229938949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1229947094 and 1229947103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1229947181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614973570 + 614973571.

It is an arithmetic number, because the mean of its divisors is an integer number (614973571).

Almost surely, 2^1229947141 is an apocalyptic number.

It is an amenable number.

1229947141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1229947141 is an equidigital number, since it uses as much as digits as its factorization.

1229947141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 40.

The square root of 1229947141 is about 35070.6022332095. The cubic root of 1229947141 is about 1071.4259211473.

The spelling of 1229947141 in words is "one billion, two hundred twenty-nine million, nine hundred forty-seven thousand, one hundred forty-one".