1180972985 has 4 divisors (see below), whose sum is σ = 1417167588. Its totient is φ = 944778384.

The previous prime is 1180972981. The next prime is 1180973041. The reversal of 1180972985 is 5892790811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5892790811 = 12517 ⋅470783.

It can be written as a sum of positive squares in 2 ways, for example, as 543309481 + 637663504 = 23309^2 + 25252^2 .

It is a cyclic number.

It is not a de Polignac number, because 1180972985 - 2² = 1180972981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1180972981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118097294 + ... + 118097303.

It is an arithmetic number, because the mean of its divisors is an integer number (354291897).

Almost surely, 2^1180972985 is an apocalyptic number.

It is an amenable number.

1180972985 is a deficient number, since it is larger than the sum of its proper divisors (236194603).

1180972985 is an equidigital number, since it uses as much as digits as its factorization.

1180972985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236194602.

The product of its (nonzero) digits is 362880, while the sum is 50.

The square root of 1180972985 is about 34365.2875006161. The cubic root of 1180972985 is about 1057.0121702295.

The spelling of 1180972985 in words is "one billion, one hundred eighty million, nine hundred seventy-two thousand, nine hundred eighty-five".