1566726 has 36 divisors (see below), whose sum is σ = 3695652. Its totient is φ = 441504.

The previous prime is 1566673. The next prime is 1566731. The reversal of 1566726 is 6276651.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 21426 + ... + 21498.

It is an arithmetic number, because the mean of its divisors is an integer number (102657).

2^1566726 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1566726, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1847826).

1566726 is an abundant number, since it is smaller than the sum of its proper divisors (2128926).

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

1566726 is an equidigital number, since it uses as much as digits as its factorization.

1566726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 85 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 1566726 is about 1251.6892585622. The cubic root of 1566726 is about 116.1442418898.

The spelling of 1566726 in words is "one million, five hundred sixty-six thousand, seven hundred twenty-six".