1187020801 has 16 divisors (see below), whose sum is σ = 1329341760. Its totient is φ = 1053319680.

The previous prime is 1187020771. The next prime is 1187020811. The reversal of 1187020801 is 1080207811.

It is a cyclic number.

It is not a de Polignac number, because 1187020801 - 2¹³ = 1187012609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1187020801.

It is not an unprimeable number, because it can be changed into a prime (1187020811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59445 + ... + 76861.

It is an arithmetic number, because the mean of its divisors is an integer number (83083860).

Almost surely, 2^1187020801 is an apocalyptic number.

It is an amenable number.

1187020801 is a deficient number, since it is larger than the sum of its proper divisors (142320959).

1187020801 is a wasteful number, since it uses less digits than its factorization.

1187020801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17664.

The product of its (nonzero) digits is 896, while the sum is 28.

The square root of 1187020801 is about 34453.1682287711. The cubic root of 1187020801 is about 1058.8134346237.

The spelling of 1187020801 in words is "one billion, one hundred eighty-seven million, twenty thousand, eight hundred one".