1177120261 has 2 divisors, whose sum is σ = 1177120262. Its totient is φ = 1177120260.

The previous prime is 1177120229. The next prime is 1177120271. The reversal of 1177120261 is 1620217711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 864007236 + 313113025 = 29394^2 + 17695^2 .

It is a cyclic number.

It is not a de Polignac number, because 1177120261 - 2⁵ = 1177120229 is a prime.

It is a super-2 number, since 2×1177120261² = 2771224217713416242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1177120271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 588560130 + 588560131.

It is an arithmetic number, because the mean of its divisors is an integer number (588560131).

Almost surely, 2^1177120261 is an apocalyptic number.

It is an amenable number.

1177120261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1177120261 is an equidigital number, since it uses as much as digits as its factorization.

1177120261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1176, while the sum is 28.

The square root of 1177120261 is about 34309.1862480007. The cubic root of 1177120261 is about 1055.8614770495.

Adding to 1177120261 its reverse (1620217711), we get a palindrome (2797337972).

The spelling of 1177120261 in words is "one billion, one hundred seventy-seven million, one hundred twenty thousand, two hundred sixty-one".