1572561 has 8 divisors (see below), whose sum is σ = 2329760. Its totient is φ = 1048356.

The previous prime is 1572559. The next prime is 1572569. The reversal of 1572561 is 1652751.

It is not a de Polignac number, because 1572561 - 2¹ = 1572559 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 58243 = 1572561 / (1 + 5 + 7 + 2 + 5 + 6 + 1).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1572569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29095 + ... + 29148.

It is an arithmetic number, because the mean of its divisors is an integer number (291220).

2^1572561 is an apocalyptic number.

It is an amenable number.

1572561 is a deficient number, since it is larger than the sum of its proper divisors (757199).

1572561 is an equidigital number, since it uses as much as digits as its factorization.

1572561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58252 (or 58246 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 1572561 is about 1254.0179424554. The cubic root of 1572561 is about 116.2882496402.

The spelling of 1572561 in words is "one million, five hundred seventy-two thousand, five hundred sixty-one".