1177261387 has 16 divisors (see below), whose sum is σ = 1223359200. Its totient is φ = 1132185600.

The previous prime is 1177261361. The next prime is 1177261391. The reversal of 1177261387 is 7831627711.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1177261387 - 2¹⁹ = 1176737099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1177261307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1451212 + ... + 1452022.

It is an arithmetic number, because the mean of its divisors is an integer number (76459950).

Almost surely, 2^1177261387 is an apocalyptic number.

1177261387 is a deficient number, since it is larger than the sum of its proper divisors (46097813).

1177261387 is an equidigital number, since it uses as much as digits as its factorization.

1177261387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374.

The product of its digits is 98784, while the sum is 43.

The square root of 1177261387 is about 34311.2428658596. The cubic root of 1177261387 is about 1055.9036714220.

The spelling of 1177261387 in words is "one billion, one hundred seventy-seven million, two hundred sixty-one thousand, three hundred eighty-seven".