1265280 has 64 divisors (see below), whose sum is σ = 4039200. Its totient is φ = 336896.

The previous prime is 1265279. The next prime is 1265281. The reversal of 1265280 is 825621.

It is an interprime number because it is at equal distance from previous prime (1265279) and next prime (1265281).

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1265280.

It is not an unprimeable number, because it can be changed into a prime (1265281) 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, 1591 + ... + 2249.

2^1265280 is an apocalyptic number.

1265280 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 1265280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2019600).

1265280 is an abundant number, since it is smaller than the sum of its proper divisors (2773920).

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

1265280 is an equidigital number, since it uses as much as digits as its factorization.

1265280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681 (or 669 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 1265280 is about 1124.8466562159. The cubic root of 1265280 is about 108.1588882161.

The spelling of 1265280 in words is "one million, two hundred sixty-five thousand, two hundred eighty".