1581360 has 80 divisors (see below), whose sum is σ = 5356800. Its totient is φ = 382720.

The previous prime is 1581317. The next prime is 1581367. The reversal of 1581360 is 631851.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1581360.

It is not an unprimeable number, because it can be changed into a prime (1581367) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2341 + ... + 2939.

It is an arithmetic number, because the mean of its divisors is an integer number (66960).

2^1581360 is an apocalyptic number.

1581360 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 1581360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2678400).

1581360 is an abundant number, since it is smaller than the sum of its proper divisors (3775440).

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

1581360 is a wasteful number, since it uses less digits than its factorization.

1581360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626 (or 620 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1581360 is about 1257.5213715878. The cubic root of 1581360 is about 116.5047368014.

The spelling of 1581360 in words is "one million, five hundred eighty-one thousand, three hundred sixty".