1275580 has 48 divisors (see below), whose sum is σ = 2903040. Its totient is φ = 469568.

The previous prime is 1275569. The next prime is 1275583. The reversal of 1275580 is 855721.

1275580 = T₆₁ + T₆₂ + ... + T₁₉₈.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21591 + ... + 21649.

It is an arithmetic number, because the mean of its divisors is an integer number (60480).

2^1275580 is an apocalyptic number.

1275580 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 1275580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1451520).

1275580 is an abundant number, since it is smaller than the sum of its proper divisors (1627460).

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

1275580 is a wasteful number, since it uses less digits than its factorization.

1275580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 1275580 is about 1129.4157781791. The cubic root of 1275580 is about 108.4515842232.

The spelling of 1275580 in words is "one million, two hundred seventy-five thousand, five hundred eighty".