1275220 has 12 divisors (see below), whose sum is σ = 2678004. Its totient is φ = 510080.

The previous prime is 1275203. The next prime is 1275227. The reversal of 1275220 is 225721.

It can be written as a sum of positive squares in 2 ways, for example, as 715716 + 559504 = 846^2 + 748^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31861 + ... + 31900.

It is an arithmetic number, because the mean of its divisors is an integer number (223167).

2^1275220 is an apocalyptic number.

1275220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1275220 is an abundant number, since it is smaller than the sum of its proper divisors (1402784).

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

1275220 is a wasteful number, since it uses less digits than its factorization.

1275220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63770 (or 63768 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 1275220 is about 1129.2563924991. The cubic root of 1275220 is about 108.4413806964.

The spelling of 1275220 in words is "one million, two hundred seventy-five thousand, two hundred twenty".