1561044 has 12 divisors (see below), whose sum is σ = 3642464. Its totient is φ = 520344.

The previous prime is 1561039. The next prime is 1561069. The reversal of 1561044 is 4401651.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1561044.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65032 + ... + 65055.

2^1561044 is an apocalyptic number.

It is an amenable number.

1561044 is an abundant number, since it is smaller than the sum of its proper divisors (2081420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1561044 is a wasteful number, since it uses less digits than its factorization.

1561044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130094 (or 130092 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1561044 is about 1249.4174642608. The cubic root of 1561044 is about 116.0036661544.

Adding to 1561044 its reverse (4401651), we get a palindrome (5962695).

The spelling of 1561044 in words is "one million, five hundred sixty-one thousand, forty-four".