1151287120 has 20 divisors (see below), whose sum is σ = 2676742740. Its totient is φ = 460514816.

The previous prime is 1151287097. The next prime is 1151287157. The reversal of 1151287120 is 217821511.

It can be written as a sum of positive squares in 2 ways, for example, as 378224704 + 773062416 = 19448^2 + 27804^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent 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, 7195465 + ... + 7195624.

It is an arithmetic number, because the mean of its divisors is an integer number (133837137).

Almost surely, 2^1151287120 is an apocalyptic number.

1151287120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1151287120 is an abundant number, since it is smaller than the sum of its proper divisors (1525455620).

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

1151287120 is a wasteful number, since it uses less digits than its factorization.

1151287120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14391102 (or 14391096 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 28.

The square root of 1151287120 is about 33930.6221575732. The cubic root of 1151287120 is about 1048.0802776335.

The spelling of 1151287120 in words is "one billion, one hundred fifty-one million, two hundred eighty-seven thousand, one hundred twenty".