1161306515 has 4 divisors (see below), whose sum is σ = 1393567824. Its totient is φ = 929045208.

The previous prime is 1161306493. The next prime is 1161306527. The reversal of 1161306515 is 5156031611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5156031611 = 149 ⋅34604239.

It is a cyclic number.

It is not a de Polignac number, because 1161306515 - 2⁶ = 1161306451 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116130647 + ... + 116130656.

It is an arithmetic number, because the mean of its divisors is an integer number (348391956).

Almost surely, 2^1161306515 is an apocalyptic number.

1161306515 is a deficient number, since it is larger than the sum of its proper divisors (232261309).

1161306515 is an equidigital number, since it uses as much as digits as its factorization.

1161306515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232261308.

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 1161306515 is about 34077.9476347975. The cubic root of 1161306515 is about 1051.1119030057. Note that the first 3 decimals are identical.

The spelling of 1161306515 in words is "one billion, one hundred sixty-one million, three hundred six thousand, five hundred fifteen".