1291080 has 128 divisors (see below), whose sum is σ = 4665600. Its totient is φ = 279552.

The previous prime is 1291079. The next prime is 1291111. The reversal of 1291080 is 801921.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24334 + ... + 24386.

It is an arithmetic number, because the mean of its divisors is an integer number (36450).

2^1291080 is an apocalyptic number.

1291080 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 1291080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2332800).

1291080 is an abundant number, since it is smaller than the sum of its proper divisors (3374520).

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

1291080 is a wasteful number, since it uses less digits than its factorization.

1291080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 1291080 is about 1136.2570131797. The cubic root of 1291080 is about 108.8890940499.

The spelling of 1291080 in words is "one million, two hundred ninety-one thousand, eighty".