1179871261 has 2 divisors, whose sum is σ = 1179871262. Its totient is φ = 1179871260.

The previous prime is 1179871249. The next prime is 1179871271. The reversal of 1179871261 is 1621789711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1064716900 + 115154361 = 32630^2 + 10731^2 .

It is a cyclic number.

It is not a de Polignac number, because 1179871261 - 2⁵ = 1179871229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1179871201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 589935630 + 589935631.

It is an arithmetic number, because the mean of its divisors is an integer number (589935631).

Almost surely, 2^1179871261 is an apocalyptic number.

It is an amenable number.

1179871261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1179871261 is an equidigital number, since it uses as much as digits as its factorization.

1179871261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 43.

The square root of 1179871261 is about 34349.2541549304. The cubic root of 1179871261 is about 1056.6833741129.

The spelling of 1179871261 in words is "one billion, one hundred seventy-nine million, eight hundred seventy-one thousand, two hundred sixty-one".