1118006261 has 2 divisors, whose sum is σ = 1118006262. Its totient is φ = 1118006260.

The previous prime is 1118006237. The next prime is 1118006291. The reversal of 1118006261 is 1626008111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 928420900 + 189585361 = 30470^2 + 13769^2 .

It is a cyclic number.

It is not a de Polignac number, because 1118006261 - 2¹⁴ = 1117989877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1118006261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1118006291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 559003130 + 559003131.

It is an arithmetic number, because the mean of its divisors is an integer number (559003131).

Almost surely, 2^1118006261 is an apocalyptic number.

It is an amenable number.

1118006261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1118006261 is an equidigital number, since it uses as much as digits as its factorization.

1118006261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 1118006261 is about 33436.6006196802. The cubic root of 1118006261 is about 1037.8822354310.

The spelling of 1118006261 in words is "one billion, one hundred eighteen million, six thousand, two hundred sixty-one".