1275520 has 32 divisors (see below), whose sum is σ = 3050820. Its totient is φ = 509952.

The previous prime is 1275503. The next prime is 1275523. The reversal of 1275520 is 255721.

It can be written as a sum of positive squares in 2 ways, for example, as 1272384 + 3136 = 1128^2 + 56^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 1275491 and 1275500.

It is not an unprimeable number, because it can be changed into a prime (1275523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357 + ... + 1636.

2^1275520 is an apocalyptic number.

1275520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1275520 is an abundant number, since it is smaller than the sum of its proper divisors (1775300).

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

1275520 is an equidigital number, since it uses as much as digits as its factorization.

1275520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2012 (or 2000 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 1275520 is about 1129.3892154612. The cubic root of 1275520 is about 108.4498837687.

The spelling of 1275520 in words is "one million, two hundred seventy-five thousand, five hundred twenty".