1147280 has 20 divisors (see below), whose sum is σ = 2667612. Its totient is φ = 458880.

The previous prime is 1147273. The next prime is 1147297. The reversal of 1147280 is 827411.

It can be written as a sum of positive squares in 2 ways, for example, as 163216 + 984064 = 404^2 + 992^2 .

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

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, 7091 + ... + 7250.

2^1147280 is an apocalyptic number.

1147280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1147280 is an abundant number, since it is smaller than the sum of its proper divisors (1520332).

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

1147280 is a wasteful number, since it uses less digits than its factorization.

1147280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14354 (or 14348 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 1147280 is about 1071.1115721530. Note that the first 3 decimals coincide. The cubic root of 1147280 is about 104.6862896571.

The spelling of 1147280 in words is "one million, one hundred forty-seven thousand, two hundred eighty".