1185651361 has 2 divisors, whose sum is σ = 1185651362. Its totient is φ = 1185651360.

The previous prime is 1185651359. The next prime is 1185651373. The reversal of 1185651361 is 1631565811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 982446336 + 203205025 = 31344^2 + 14255^2 .

It is an emirp because it is prime and its reverse (1631565811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1185651361 - 2¹ = 1185651359 is a prime.

Together with 1185651359, 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 1185651361.

It is not a weakly prime, because it can be changed into another prime (1185651391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 592825680 + 592825681.

It is an arithmetic number, because the mean of its divisors is an integer number (592825681).

Almost surely, 2^1185651361 is an apocalyptic number.

It is an amenable number.

1185651361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1185651361 is an equidigital number, since it uses as much as digits as its factorization.

1185651361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 37.

The square root of 1185651361 is about 34433.2885591835. The cubic root of 1185651361 is about 1058.4061012868.

The spelling of 1185651361 in words is "one billion, one hundred eighty-five million, six hundred fifty-one thousand, three hundred sixty-one".