1566425 has 12 divisors (see below), whose sum is σ = 2220096. Its totient is φ = 1074000.

The previous prime is 1566403. The next prime is 1566427. The reversal of 1566425 is 5246651.

It is a de Polignac number, because none of the positive numbers 2^k-1566425 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1566427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4301 + ... + 4650.

It is an arithmetic number, because the mean of its divisors is an integer number (185008).

2^1566425 is an apocalyptic number.

It is an amenable number.

1566425 is a deficient number, since it is larger than the sum of its proper divisors (653671).

1566425 is an equidigital number, since it uses as much as digits as its factorization.

1566425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8968 (or 8963 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 1566425 is about 1251.5690152764. The cubic root of 1566425 is about 116.1368035213.

It can be divided in two parts, 1566 and 425, that added together give a palindrome (1991).

The spelling of 1566425 in words is "one million, five hundred sixty-six thousand, four hundred twenty-five".