1561322 has 16 divisors (see below), whose sum is σ = 2693760. Its totient is φ = 664848.

The previous prime is 1561303. The next prime is 1561337. The reversal of 1561322 is 2231651.

It is a junction number, because it is equal to n+sod(n) for n = 1561294 and 1561303.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2963 + ... + 3449.

It is an arithmetic number, because the mean of its divisors is an integer number (168360).

2^1561322 is an apocalyptic number.

1561322 is a deficient number, since it is larger than the sum of its proper divisors (1132438).

1561322 is a wasteful number, since it uses less digits than its factorization.

1561322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725.

The product of its digits is 360, while the sum is 20.

The square root of 1561322 is about 1249.5287111547. The cubic root of 1561322 is about 116.0105519533.

Adding to 1561322 its reverse (2231651), we get a palindrome (3792973).

The spelling of 1561322 in words is "one million, five hundred sixty-one thousand, three hundred twenty-two".