1181520489 has 16 divisors (see below), whose sum is σ = 1612707840. Its totient is φ = 769184400.

The previous prime is 1181520463. The next prime is 1181520499. The reversal of 1181520489 is 9840251811.

It is not a de Polignac number, because 1181520489 - 2¹⁵ = 1181487721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1181520499) 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, 4624 + ... + 48830.

It is an arithmetic number, because the mean of its divisors is an integer number (100794240).

Almost surely, 2^1181520489 is an apocalyptic number.

It is an amenable number.

1181520489 is a deficient number, since it is larger than the sum of its proper divisors (431187351).

1181520489 is a wasteful number, since it uses less digits than its factorization.

1181520489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44420.

The product of its (nonzero) digits is 23040, while the sum is 39.

The square root of 1181520489 is about 34373.2525228556. The cubic root of 1181520489 is about 1057.1754900767.

The spelling of 1181520489 in words is "one billion, one hundred eighty-one million, five hundred twenty thousand, four hundred eighty-nine".