1145280 has 56 divisors (see below), whose sum is σ = 3639312. Its totient is φ = 305152.

The previous prime is 1145269. The next prime is 1145281. The reversal of 1145280 is 825411.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364 + ... + 1556.

2^1145280 is an apocalyptic number.

1145280 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 1145280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1819656).

1145280 is an abundant number, since it is smaller than the sum of its proper divisors (2494032).

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

1145280 is a wasteful number, since it uses less digits than its factorization.

1145280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213 (or 1203 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 1145280 is about 1070.1775553617. The cubic root of 1145280 is about 104.6254226904.

The spelling of 1145280 in words is "one million, one hundred forty-five thousand, two hundred eighty".