1186720001 has 2 divisors, whose sum is σ = 1186720002. Its totient is φ = 1186720000.

The previous prime is 1186719997. The next prime is 1186720009. The reversal of 1186720001 is 1000276811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 759057601 + 427662400 = 27551^2 + 20680^2 .

It is an emirp because it is prime and its reverse (1000276811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1186720001 - 2² = 1186719997 is a prime.

It is not a weakly prime, because it can be changed into another prime (1186720009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 593360000 + 593360001.

It is an arithmetic number, because the mean of its divisors is an integer number (593360001).

Almost surely, 2^1186720001 is an apocalyptic number.

It is an amenable number.

1186720001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1186720001 is an equidigital number, since it uses as much as digits as its factorization.

1186720001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 1186720001 is about 34448.8026061865. The cubic root of 1186720001 is about 1058.7239899717.

Adding to 1186720001 its reverse (1000276811), we get a palindrome (2186996812).

The spelling of 1186720001 in words is "one billion, one hundred eighty-six million, seven hundred twenty thousand, one".