1275660 has 72 divisors (see below), whose sum is σ = 4084080. Its totient is φ = 321408.

The previous prime is 1275643. The next prime is 1275661. The reversal of 1275660 is 665721.

It is not an unprimeable number, because it can be changed into a prime (1275661) 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 23 ways as a sum of consecutive naturals, for example, 3234 + ... + 3606.

2^1275660 is an apocalyptic number.

1275660 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 1275660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2042040).

1275660 is an abundant number, since it is smaller than the sum of its proper divisors (2808420).

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

1275660 is a wasteful number, since it uses less digits than its factorization.

1275660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 1275660 is about 1129.4511941647. The cubic root of 1275660 is about 108.4538514128.

The spelling of 1275660 in words is "one million, two hundred seventy-five thousand, six hundred sixty".