1291760 has 40 divisors (see below), whose sum is σ = 3060816. Its totient is φ = 506880.

The previous prime is 1291691. The next prime is 1291783. The reversal of 1291760 is 671921.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5240 + ... + 5480.

2^1291760 is an apocalyptic number.

1291760 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 1291760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1530408).

1291760 is an abundant number, since it is smaller than the sum of its proper divisors (1769056).

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

1291760 is a wasteful number, since it uses less digits than its factorization.

1291760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321 (or 315 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 1291760 is about 1136.5562018660. The cubic root of 1291760 is about 108.9082076572.

The spelling of 1291760 in words is "one million, two hundred ninety-one thousand, seven hundred sixty".