1271580 has 24 divisors (see below), whose sum is σ = 3560592. Its totient is φ = 339072.

The previous prime is 1271561. The next prime is 1271597. The reversal of 1271580 is 851721.

It is a self number, because there is not a number n which added to its sum of digits gives 1271580.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10537 + ... + 10656.

It is an arithmetic number, because the mean of its divisors is an integer number (148358).

2^1271580 is an apocalyptic number.

1271580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1271580 is an abundant number, since it is smaller than the sum of its proper divisors (2289012).

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

1271580 is a wasteful number, since it uses less digits than its factorization.

1271580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21205 (or 21203 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 1271580 is about 1127.6435607052. The cubic root of 1271580 is about 108.3381036690.

The spelling of 1271580 in words is "one million, two hundred seventy-one thousand, five hundred eighty".