1566201 has 16 divisors (see below), whose sum is σ = 2570624. Its totient is φ = 825984.

The previous prime is 1566199. The next prime is 1566209. The reversal of 1566201 is 1026651.

It is a happy number.

It is not a de Polignac number, because 1566201 - 2¹ = 1566199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1566209) 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, 2596 + ... + 3141.

It is an arithmetic number, because the mean of its divisors is an integer number (160664).

2^1566201 is an apocalyptic number.

It is an amenable number.

1566201 is a deficient number, since it is larger than the sum of its proper divisors (1004423).

1566201 is a wasteful number, since it uses less digits than its factorization.

1566201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5760.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1566201 is about 1251.4795244030. The cubic root of 1566201 is about 116.1312673729.

The spelling of 1566201 in words is "one million, five hundred sixty-six thousand, two hundred one".