1161245120 has 168 divisors, whose sum is σ = 3321832320. Its totient is φ = 385136640.

The previous prime is 1161245119. The next prime is 1161245149. The reversal of 1161245120 is 215421611.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 484886 + ... + 487274.

Almost surely, 2^1161245120 is an apocalyptic number.

1161245120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1161245120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1660916160).

1161245120 is an abundant number, since it is smaller than the sum of its proper divisors (2160587200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1161245120 is a wasteful number, since it uses less digits than its factorization.

1161245120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2451 (or 2434 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 1161245120 is about 34077.0468204039. The cubic root of 1161245120 is about 1051.0933795720.

Adding to 1161245120 its reverse (215421611), we get a palindrome (1376666731).

The spelling of 1161245120 in words is "one billion, one hundred sixty-one million, two hundred forty-five thousand, one hundred twenty".