1561227 has 4 divisors (see below), whose sum is σ = 2081640. Its totient is φ = 1040816.

The previous prime is 1561213. The next prime is 1561243. The reversal of 1561227 is 7221651.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1561227 - 2⁶ = 1561163 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 1561197 and 1561206.

It is not an unprimeable number, because it can be changed into a prime (1561247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260202 + ... + 260207.

It is an arithmetic number, because the mean of its divisors is an integer number (520410).

2^1561227 is an apocalyptic number.

1561227 is a deficient number, since it is larger than the sum of its proper divisors (520413).

1561227 is an equidigital number, since it uses as much as digits as its factorization.

1561227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520412.

The product of its digits is 840, while the sum is 24.

The square root of 1561227 is about 1249.4906962439. The cubic root of 1561227 is about 116.0081989845.

Adding to 1561227 its reverse (7221651), we get a palindrome (8782878).

The spelling of 1561227 in words is "one million, five hundred sixty-one thousand, two hundred twenty-seven".