1161277215 has 24 divisors (see below), whose sum is σ = 2161398960. Its totient is φ = 530869248.

The previous prime is 1161277213. The next prime is 1161277217. The reversal of 1161277215 is 5127721611.

It is an interprime number because it is at equal distance from previous prime (1161277213) and next prime (1161277217).

It is not a de Polignac number, because 1161277215 - 2¹ = 1161277213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161277213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 789250 + ... + 790719.

It is an arithmetic number, because the mean of its divisors is an integer number (90058290).

Almost surely, 2^1161277215 is an apocalyptic number.

1161277215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1161277215 is a deficient number, since it is larger than the sum of its proper divisors (1000121745).

1161277215 is a wasteful number, since it uses less digits than its factorization.

1161277215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579991 (or 1579984 counting only the distinct ones).

The product of its digits is 5880, while the sum is 33.

The square root of 1161277215 is about 34077.5177353046. The cubic root of 1161277215 is about 1051.1030630088.

Adding to 1161277215 its reverse (5127721611), we get a palindrome (6288998826).

The spelling of 1161277215 in words is "one billion, one hundred sixty-one million, two hundred seventy-seven thousand, two hundred fifteen".