1566145 has 16 divisors (see below), whose sum is σ = 2223360. Its totient is φ = 1036224.

The previous prime is 1566143. The next prime is 1566163. The reversal of 1566145 is 5416651.

It is not a de Polignac number, because 1566145 - 2¹ = 1566143 is a prime.

It is a super-2 number, since 2×1566145² = 4905620322050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1566143) 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, 244 + ... + 1786.

It is an arithmetic number, because the mean of its divisors is an integer number (138960).

2^1566145 is an apocalyptic number.

It is an amenable number.

1566145 is a deficient number, since it is larger than the sum of its proper divisors (657215).

1566145 is a wasteful number, since it uses less digits than its factorization.

1566145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584.

The product of its digits is 3600, while the sum is 28.

The square root of 1566145 is about 1251.4571506848. The cubic root of 1566145 is about 116.1298832533.

It can be divided in two parts, 1566 and 145, that added together give a triangular number (1711 = T₅₈).

The spelling of 1566145 in words is "one million, five hundred sixty-six thousand, one hundred forty-five".