1151255280 has 80 divisors (see below), whose sum is σ = 4078738944. Its totient is φ = 263143680.

The previous prime is 1151255279. The next prime is 1151255299. The reversal of 1151255280 is 825521511.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 340956 + ... + 344315.

Almost surely, 2^1151255280 is an apocalyptic number.

1151255280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1151255280 is an abundant number, since it is smaller than the sum of its proper divisors (2927483664).

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

1151255280 is a wasteful number, since it uses less digits than its factorization.

1151255280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685294 (or 685288 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 30.

The square root of 1151255280 is about 33930.1529616358. The cubic root of 1151255280 is about 1048.0706156407.

Adding to 1151255280 its reverse (825521511), we get a palindrome (1976776791).

The spelling of 1151255280 in words is "one billion, one hundred fifty-one million, two hundred fifty-five thousand, two hundred eighty".