1172516081 has 16 divisors (see below), whose sum is σ = 1341878400. Its totient is φ = 1014652800.

The previous prime is 1172516041. The next prime is 1172516083. The reversal of 1172516081 is 1806152711.

It is a cyclic number.

It is not a de Polignac number, because 1172516081 - 2¹⁸ = 1172253937 is a prime.

It is a super-2 number, since 2×1172516081² = 2749587920407197122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1172516083) 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, 3236 + ... + 48533.

It is an arithmetic number, because the mean of its divisors is an integer number (83867400).

Almost surely, 2^1172516081 is an apocalyptic number.

1172516081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1172516081 is a deficient number, since it is larger than the sum of its proper divisors (169362319).

1172516081 is a wasteful number, since it uses less digits than its factorization.

1172516081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51880.

The product of its (nonzero) digits is 3360, while the sum is 32.

The square root of 1172516081 is about 34242.0221511522. The cubic root of 1172516081 is about 1054.4830485471.

Adding to 1172516081 its reverse (1806152711), we get a palindrome (2978668792).

The spelling of 1172516081 in words is "one billion, one hundred seventy-two million, five hundred sixteen thousand, eighty-one".